diff --git a/src/frontend/apps/drive/src/features/api/APIError.ts b/src/frontend/apps/drive/src/features/api/APIError.ts
index 8942ebf0..2fa7dc24 100644
--- a/src/frontend/apps/drive/src/features/api/APIError.ts
+++ b/src/frontend/apps/drive/src/features/api/APIError.ts
@@ -13,6 +13,13 @@ export class APIError extends Error {
   }
 }
 
+export const errorToCode = (error: unknown): string | undefined => {
+  if (error instanceof APIError) {
+    return error.data?.errors?.[0]?.code;
+  }
+  return undefined;
+};
+
 export const errorToString = (error: unknown): string => {
   if (typeof error === "string") {
     return error;
diff --git a/src/frontend/apps/drive/src/features/drivers/Driver.ts b/src/frontend/apps/drive/src/features/drivers/Driver.ts
index b083a792..25d34530 100644
--- a/src/frontend/apps/drive/src/features/drivers/Driver.ts
+++ b/src/frontend/apps/drive/src/features/drivers/Driver.ts
@@ -77,6 +77,9 @@ export type Entitlement<T extends EntitlementReason> = {
 export enum EntitlementCanUploadReasons {
   NO_ORGANIZATION = "no_organization",
   NOT_ACTIVATED = "not_activated",
+  USER_QUOTA_EXCEEDED = "user_quota_excedeed",
+  USER_OVERRIDE_QUOTA_EXCEEDED = "user_override_quota_excedeed",
+  ORGANIZATION_QUOTA_EXCEEDED = "organization_quota_excedeed",
 }
 
 type EntitlementOperator = {
diff --git a/src/frontend/apps/drive/src/features/drivers/implementations/StandardDriver.ts b/src/frontend/apps/drive/src/features/drivers/implementations/StandardDriver.ts
index eb554e15..ea3b1932 100644
--- a/src/frontend/apps/drive/src/features/drivers/implementations/StandardDriver.ts
+++ b/src/frontend/apps/drive/src/features/drivers/implementations/StandardDriver.ts
@@ -163,10 +163,18 @@ export class StandardDriver extends Driver {
     const payload = {
       ...(parentId ? { target_item_id: parentId } : {}),
     };
-    await fetchAPI(`items/${id}/move/`, {
-      method: "POST",
-      body: JSON.stringify(payload),
-    });
+    await fetchAPI(
+      `items/${id}/move/`,
+      {
+        method: "POST",
+        body: JSON.stringify(payload),
+      },
+      {
+        // A move can be rejected (e.g. quota gate): let the caller toast the
+        // error instead of redirecting the whole app to the 403 page.
+        redirectOn40x: false,
+      },
+    );
   }
 
   async getItemAccesses(itemId: string): Promise<Access[]> {
@@ -421,10 +429,16 @@ export class StandardDriver extends Driver {
         throw new DOMException("Upload cancelled", "AbortError");
       }
 
-      await fetchAPI(`items/${item.id}/upload-ended/`, {
-        method: "POST",
-        signal: abortController.signal,
-      });
+      await fetchAPI(
+        `items/${item.id}/upload-ended/`,
+        {
+          method: "POST",
+          signal: abortController.signal,
+        },
+        {
+          redirectOn40x: false,
+        },
+      );
 
       progressHandler?.(100);
 
@@ -462,9 +476,17 @@ export class StandardDriver extends Driver {
   }
 
   async duplicateItem(id: string): Promise<Item> {
-    const response = await fetchAPI(`items/${id}/duplicate/`, {
-      method: "POST",
-    });
+    const response = await fetchAPI(
+      `items/${id}/duplicate/`,
+      {
+        method: "POST",
+      },
+      {
+        // A duplication can be rejected (e.g. quota gate): let the global
+        // handler toast the error instead of redirecting to the 403 page.
+        redirectOn40x: false,
+      },
+    );
     return jsonToItem(await response.json());
   }
 
diff --git a/src/frontend/apps/drive/src/features/entitlement-disclaimers/disclaimers/CannotUploadDisclaimer.tsx b/src/frontend/apps/drive/src/features/entitlement-disclaimers/disclaimers/CannotUploadDisclaimer.tsx
index ce57cc8b..5ada8aaa 100644
--- a/src/frontend/apps/drive/src/features/entitlement-disclaimers/disclaimers/CannotUploadDisclaimer.tsx
+++ b/src/frontend/apps/drive/src/features/entitlement-disclaimers/disclaimers/CannotUploadDisclaimer.tsx
@@ -51,24 +51,12 @@ const Content = ({
   entitlements: Entitlements;
 }) => {
   const { t } = useTranslation();
+  const reasonTitle = getCannotUploadReasonDescription(
+    entitlements.can_upload.reason,
+  );
   return (
     <div>
-      {entitlements.can_upload.reason ===
-        EntitlementCanUploadReasons.NOT_ACTIVATED && (
-        <p>
-          {t(
-            "entitlements.disclaimers.cannot_upload.not_activated.description",
-          )}
-        </p>
-      )}
-      {entitlements.can_upload.reason ===
-        EntitlementCanUploadReasons.NO_ORGANIZATION && (
-        <p>
-          {t(
-            "entitlements.disclaimers.cannot_upload.no_organization.description",
-          )}
-        </p>
-      )}
+      {reasonTitle && <p>{reasonTitle}</p>}
       {config?.showPotentialOperators &&
         (entitlements.context?.potentialOperators?.length ?? 0) > 0 && (
           <div>
@@ -106,4 +94,15 @@ const Content = ({
   );
 };
 
+export const getCannotUploadReasonDescription = (
+  reason?: EntitlementCanUploadReasons,
+) => {
+  if (reason) {
+    return i18n.t(
+      `entitlements.disclaimers.cannot_upload.${reason}.description`,
+    );
+  }
+  return undefined;
+};
+
 export default CannotUploadDisclaimer;
diff --git a/src/frontend/apps/drive/src/features/entitlement-disclaimers/types.ts b/src/frontend/apps/drive/src/features/entitlement-disclaimers/types.ts
index 4a357198..01e9d749 100644
--- a/src/frontend/apps/drive/src/features/entitlement-disclaimers/types.ts
+++ b/src/frontend/apps/drive/src/features/entitlement-disclaimers/types.ts
@@ -12,7 +12,7 @@ export type EntitlementDisclaimer<
   name: Name;
   show: (entitlements: Entitlements) => boolean;
   render: (
-    config: DisclaimersConfig[Name],
+    config: DisclaimersConfig[Name] | undefined,
     entitlements: Entitlements,
   ) => {
     title: string;
diff --git a/src/frontend/apps/drive/src/features/explorer/api/useMoveItem.tsx b/src/frontend/apps/drive/src/features/explorer/api/useMoveItem.tsx
index 45b76d83..9cc15186 100644
--- a/src/frontend/apps/drive/src/features/explorer/api/useMoveItem.tsx
+++ b/src/frontend/apps/drive/src/features/explorer/api/useMoveItem.tsx
@@ -1,5 +1,11 @@
 import { getDriver } from "@/features/config/Config";
+import { getCanUploadErrorDescription } from "@/utils/entitlements";
 import { useMutation, useQueryClient } from "@tanstack/react-query";
+import { useTranslation } from "react-i18next";
+import {
+  addToast,
+  ToasterItem,
+} from "@/features/ui/components/toaster/Toaster";
 import { useRemoveItemsFromPaginatedList } from "../hooks/useOptimisticPagination";
 import {
   getMyFilesQueryKey,
@@ -14,6 +20,7 @@ export const useMoveItems = () => {
     oldParentId?: string;
   };
 
+  const { t } = useTranslation();
   const queryClient = useQueryClient();
   const driver = getDriver();
 
@@ -51,6 +58,24 @@ export const useMoveItems = () => {
       queryClient.invalidateQueries({
         queryKey: ["items", variables.parentId, "children", "infinite"],
       });
+
+      addToast(
+        <ToasterItem type="error">
+          <span className="material-icons">arrow_forward</span>
+          <span>
+            {getCanUploadErrorDescription(err, (key) =>
+              t(`explorer.modal.move.errors.${key}`),
+            ) ??
+              t("explorer.actions.move.toast_error", {
+                count: variables.ids.length,
+              })}
+          </span>
+        </ToasterItem>,
+      );
+    },
+    meta: {
+      // The onError above already toasts a localized message.
+      noGlobalError: true,
     },
   });
 };
diff --git a/src/frontend/apps/drive/src/features/explorer/components/ExplorerDndProvider.tsx b/src/frontend/apps/drive/src/features/explorer/components/ExplorerDndProvider.tsx
index 0447f6e2..c5d566ba 100644
--- a/src/frontend/apps/drive/src/features/explorer/components/ExplorerDndProvider.tsx
+++ b/src/frontend/apps/drive/src/features/explorer/components/ExplorerDndProvider.tsx
@@ -116,20 +116,24 @@ export const ExplorerDndProvider = ({ children }: ExplorerDndProviderProps) => {
 
     setOveredItemIds({});
     const ids = currentSelected.map((item) => item.id);
-    await moveItems.mutateAsync(
-      {
-        ids: ids,
-        parentId: newParentId,
-        oldParentId: itemId,
-      },
-      {
-        onSuccess: () => {
-          addItemsMovedToast(ids.length);
-          // Reset the selected items after the move
-          setSelectedItems([]);
+    await moveItems
+      .mutateAsync(
+        {
+          ids: ids,
+          parentId: newParentId,
+          oldParentId: itemId,
         },
-      },
-    );
+        {
+          onSuccess: () => {
+            addItemsMovedToast(ids.length);
+            // Reset the selected items after the move
+            setSelectedItems([]);
+          },
+        },
+      )
+      .catch(() => {
+        // The error feedback is already handled by the mutation's onError.
+      });
   };
 
   const handleDragEnd = async ({ active, over }: DragEndEvent) => {
diff --git a/src/frontend/apps/drive/src/features/explorer/components/modals/move/ExplorerMoveFolderModal.tsx b/src/frontend/apps/drive/src/features/explorer/components/modals/move/ExplorerMoveFolderModal.tsx
index 123a6ef0..fb53edd3 100644
--- a/src/frontend/apps/drive/src/features/explorer/components/modals/move/ExplorerMoveFolderModal.tsx
+++ b/src/frontend/apps/drive/src/features/explorer/components/modals/move/ExplorerMoveFolderModal.tsx
@@ -131,7 +131,9 @@ export const ExplorerMoveFolder = ({
     newParentId: string | undefined,
     oldParentId: string,
   ) => {
-    moveItems.mutateAsync(
+    // mutate (not mutateAsync): a rejection is already handled by the
+    // mutation's onError, an unused rejected promise would be unhandled.
+    moveItems.mutate(
       {
         ids: ids,
         parentId: newParentId,
diff --git a/src/frontend/apps/drive/src/features/explorer/hooks/useItemActionMenuItems.tsx b/src/frontend/apps/drive/src/features/explorer/hooks/useItemActionMenuItems.tsx
index 0bb2b74b..38364d83 100644
--- a/src/frontend/apps/drive/src/features/explorer/hooks/useItemActionMenuItems.tsx
+++ b/src/frontend/apps/drive/src/features/explorer/hooks/useItemActionMenuItems.tsx
@@ -34,6 +34,7 @@ import {
   useMutationDuplicateItem,
 } from "./useMutations";
 import { DefaultRoute } from "@/utils/defaultRoutes";
+import { getCanUploadErrorDescription } from "@/utils/entitlements";
 import {
   addToast,
   ToasterItem,
@@ -179,11 +180,14 @@ export const useItemActionMenuItems = ({
         callback: async () => {
           try {
             await duplicateItem(effectiveItemId);
-          } catch {
+          } catch (err) {
             addToast(
               <ToasterItem type="error">
                 <span className="material-icons">content_copy</span>
-                <span>{t("explorer.item.actions.duplicate_error")}</span>
+                <span>
+                  {getCanUploadErrorDescription(err) ??
+                    t("explorer.item.actions.duplicate_error")}
+                </span>
               </ToasterItem>,
             );
           }
diff --git a/src/frontend/apps/drive/src/features/explorer/hooks/useMutations.ts b/src/frontend/apps/drive/src/features/explorer/hooks/useMutations.ts
index e05a92b7..389ee15d 100644
--- a/src/frontend/apps/drive/src/features/explorer/hooks/useMutations.ts
+++ b/src/frontend/apps/drive/src/features/explorer/hooks/useMutations.ts
@@ -231,6 +231,10 @@ export const useMutationDuplicateItem = () => {
       const parentId = item?.originalId ?? item?.id;
       refresh(parentId);
     },
+    meta: {
+      // The caller already toasts a localized message on failure.
+      noGlobalError: true,
+    },
   });
 };
 
diff --git a/src/frontend/apps/drive/src/features/explorer/hooks/useUpload.tsx b/src/frontend/apps/drive/src/features/explorer/hooks/useUpload.tsx
index 69b114c4..1f95adea 100644
--- a/src/frontend/apps/drive/src/features/explorer/hooks/useUpload.tsx
+++ b/src/frontend/apps/drive/src/features/explorer/hooks/useUpload.tsx
@@ -16,7 +16,7 @@ import { useCanCreateChildren } from "@/features/items/utils";
 import { getMyFilesQueryKey } from "@/utils/defaultRoutes";
 import { useConfig } from "@/features/config/ConfigProvider";
 import { getDriver } from "@/features/config/Config";
-import { APIError } from "@/features/api/APIError";
+import { errorToCode } from "@/features/api/APIError";
 import { useRefreshQueryCacheAfterMutation } from "./useRefreshItems";
 import { isIdInItemTree } from "../utils/utils";
 
@@ -33,6 +33,7 @@ import {
   customGetFilesFromEvent,
   isEmptyFolderMarker,
 } from "@/features/explorer/utils/dropTraversal";
+import { getCannotUploadReasonDescription } from "@/features/entitlement-disclaimers/disclaimers/CannotUploadDisclaimer";
 
 type FileUpload = FileWithPath & {
   parentId?: string;
@@ -421,10 +422,12 @@ export const useUploadZone = ({ item }: { item: Item }) => {
           ...prev,
           step: UploadingStep.NONE,
         }));
+        const description = getCannotUploadReasonDescription(entitlements.can_upload.reason);
         addToast(
           <ToasterItem type="error">
             <span>
               {entitlements.can_upload.message ||
+                description ||
                 t("entitlements.can_upload.cannot_upload")}
             </span>
           </ToasterItem>,
@@ -618,10 +621,7 @@ export const useUploadZone = ({ item }: { item: Item }) => {
             // Already handled by onCancelFile/onCancelAll
             continue;
           }
-          let errorCode = "unknown";
-          if (err instanceof APIError && err.data?.errors?.[0]?.code) {
-            errorCode = err.data.errors[0].code;
-          }
+          const errorCode = errorToCode(err) ?? "unknown";
 
           // Keep file in state with error status
           setUploadingState((prev) => ({
@@ -705,9 +705,7 @@ export const useUploadZone = ({ item }: { item: Item }) => {
       // Collect matches first: onCancelFile mutates the map we're iterating.
       const toCancel: string[] = [];
       for (const [filePath, upload] of activeUploadsRef.current) {
-        if (
-          deletedIds.some((id) => isIdInItemTree(upload.parentPath, id))
-        ) {
+        if (deletedIds.some((id) => isIdInItemTree(upload.parentPath, id))) {
           toCancel.push(filePath);
         }
       }
diff --git a/src/frontend/apps/drive/src/features/i18n/translations.json b/src/frontend/apps/drive/src/features/i18n/translations.json
index f0dd74bc..ded6e6e0 100644
--- a/src/frontend/apps/drive/src/features/i18n/translations.json
+++ b/src/frontend/apps/drive/src/features/i18n/translations.json
@@ -9,6 +9,15 @@
           "close": "OK",
           "cannot_upload": {
             "title": "Uploads are unavailable",
+            "user_quota_excedeed": {
+              "description": "You can no longer add documents, your personal quota has been reached. Contact your administrator."
+            },
+            "user_override_quota_excedeed": {
+              "description": "You can no longer add documents, your personal storage limit has been reached. Contact your administrator."
+            },
+            "organization_quota_excedeed": {
+              "description": "You can no longer add documents, your organization quota has been reached. Contact your administrator."
+            },
             "no_organization": {
               "description": "Your account isn't linked to an organization, so you can't upload files yet. Contact your administrator to get access."
             },
@@ -157,7 +166,14 @@
             "move_to_root": "Move to root",
             "aria_label": "Move folder modal",
             "description_one_item": "Choose the new location for <strong>{{name}}</strong>",
-            "description_multiple_items": "Choose the new location for the <strong>{{count}}</strong> selected elements"
+            "description_multiple_items": "Choose the new location for the <strong>{{count}}</strong> selected elements",
+            "errors": {
+              "user_quota_excedeed": "You can no longer move documents to the root, your personal quota has been reached. Contact your administrator.",
+              "user_override_quota_excedeed": "You can no longer move documents to the root, your personal storage limit has been reached. Contact your administrator.",
+              "organization_quota_excedeed": "You can no longer move documents to the root, your organization quota has been reached. Contact your administrator.",
+              "no_organization": "Your account isn't linked to an organization, so you can't move documents to the root yet. Contact your administrator to get access.",
+              "not_activated": "File upload isn't activated for your organization yet, so you can't move documents to the root. Contact your administrator to enable it."
+            }
           }
         },
         "drag_overlay": {
@@ -484,10 +500,20 @@
                 "file_type_not_allowed": "This file type is not allowed.",
                 "item_create_file_extension_not_allowed": "This file extension is not allowed.",
                 "file_too_large": "The file exceeds the maximum allowed size.",
+                "user_quota_excedeed": "You can no longer add documents, your personal quota has been reached. Contact your administrator.",
+                "user_override_quota_excedeed": "You can no longer add documents, your personal storage limit has been reached. Contact your administrator.",
+                "organization_quota_excedeed": "You can no longer add documents, your organization quota has been reached. Contact your administrator.",
+                "no_organization": "Your account isn't linked to an organization, so you can't upload files yet. Contact your administrator to get access.",
+                "not_activated": "File upload isn't activated for your organization yet. Contact your administrator to enable it.",
                 "unknown": "An unexpected error occurred."
               },
               "error_short": {
-                "file_too_large": "File too large"
+                "file_too_large": "File too large",
+                "user_quota_excedeed": "Quota exceeded",
+                "user_override_quota_excedeed": "Quota exceeded",
+                "organization_quota_excedeed": "Quota exceeded",
+                "no_organization": "Upload not allowed",
+                "not_activated": "Upload not allowed"
               }
             },
             "cancel_modal": {
@@ -510,7 +536,9 @@
           },
           "move": {
             "toast_one": "{{count}} item moved",
-            "toast_other": "{{count}} items moved"
+            "toast_other": "{{count}} items moved",
+            "toast_error_one": "An error occurred while moving the item.",
+            "toast_error_other": "An error occurred while moving the items."
           },
           "share": {
             "modal": {
@@ -656,6 +684,15 @@
           "close": "OK",
           "cannot_upload": {
             "title": "Les téléversements ne sont pas disponibles",
+            "user_quota_excedeed": {
+              "description": "Vous ne pouvez plus ajouter de documents, votre quota personnel est atteint. Contactez votre administrateur."
+            },
+            "user_override_quota_excedeed": {
+              "description": "Vous ne pouvez plus ajouter de documents, votre limite de stockage personnelle est atteinte. Contactez votre administrateur."
+            },
+            "organization_quota_excedeed": {
+              "description": "Vous ne pouvez plus ajouter de documents, votre quota d'organisation est atteint. Contactez votre administrateur."
+            },
             "no_organization": {
               "description": "Votre compte n'est pas rattaché à une organisation, vous ne pouvez pas encore téléverser de fichiers. Contactez votre administrateur pour obtenir un accès."
             },
@@ -804,7 +841,14 @@
             "move_to_root": "Déplacer vers la racine",
             "aria_label": "Modal de déplacement de dossier",
             "description_one_item": "Choisissez le nouvel emplacement pour <strong>{{name}}</strong>",
-            "description_multiple_items": "Choisissez le nouvel emplacement pour les <strong>{{count}}</strong> éléments sélectionnés"
+            "description_multiple_items": "Choisissez le nouvel emplacement pour les <strong>{{count}}</strong> éléments sélectionnés",
+            "errors": {
+              "user_quota_excedeed": "Vous ne pouvez plus déplacer de documents à la racine, votre quota personnel est atteint. Contactez votre administrateur.",
+              "user_override_quota_excedeed": "Vous ne pouvez plus déplacer de documents à la racine, votre limite de stockage personnelle est atteinte. Contactez votre administrateur.",
+              "organization_quota_excedeed": "Vous ne pouvez plus déplacer de documents à la racine, votre quota d'organisation est atteint. Contactez votre administrateur.",
+              "no_organization": "Votre compte n'est pas rattaché à une organisation, vous ne pouvez pas encore déplacer de documents à la racine. Contactez votre administrateur pour obtenir un accès.",
+              "not_activated": "Le téléversement de fichiers n'est pas encore activé pour votre organisation. Vous ne pouvez donc pas déplacer de documents à la racine. Contactez votre administrateur pour l'activer."
+            }
           }
         },
         "drag_overlay": {
@@ -1134,10 +1178,20 @@
                 "file_type_not_allowed": "Ce type de fichier n'est pas autorisé.",
                 "item_create_file_extension_not_allowed": "Cette extension de fichier n'est pas autorisée.",
                 "file_too_large": "Le fichier dépasse la taille maximale autorisée.",
+                "user_quota_excedeed": "Vous ne pouvez plus ajouter de documents, votre quota personnel est atteint. Contactez votre administrateur.",
+                "user_override_quota_excedeed": "Vous ne pouvez plus ajouter de documents, votre limite de stockage personnelle est atteinte. Contactez votre administrateur.",
+                "organization_quota_excedeed": "Vous ne pouvez plus ajouter de documents, votre quota d'organisation est atteint. Contactez votre administrateur.",
+                "no_organization": "Votre compte n'est pas rattaché à une organisation, vous ne pouvez pas encore téléverser de fichiers. Contactez votre administrateur pour obtenir un accès.",
+                "not_activated": "Le téléversement de fichiers n'est pas encore activé pour votre organisation. Contactez votre administrateur pour l'activer.",
                 "unknown": "Une erreur inattendue est survenue."
               },
               "error_short": {
-                "file_too_large": "Fichier trop volumineux"
+                "file_too_large": "Fichier trop volumineux",
+                "user_quota_excedeed": "Quota atteint",
+                "user_override_quota_excedeed": "Quota atteint",
+                "organization_quota_excedeed": "Quota atteint",
+                "no_organization": "Téléversement non autorisé",
+                "not_activated": "Téléversement non autorisé"
               }
             },
             "cancel_modal": {
@@ -1164,7 +1218,9 @@
           },
           "move": {
             "toast_one": "{{count}} élément déplacé",
-            "toast_other": "{{count}} éléments déplacés"
+            "toast_other": "{{count}} éléments déplacés",
+            "toast_error_one": "Une erreur est survenue lors du déplacement de l'élément.",
+            "toast_error_other": "Une erreur est survenue lors du déplacement des éléments."
           },
           "share": {
             "modal": {
@@ -1311,6 +1367,15 @@
           "close": "OK",
           "cannot_upload": {
             "title": "Uploaden is niet beschikbaar",
+            "user_quota_excedeed": {
+              "description": "U kunt geen documenten meer toevoegen, uw persoonlijke quotum is bereikt. Neem contact op met uw beheerder."
+            },
+            "user_override_quota_excedeed": {
+              "description": "U kunt geen documenten meer toevoegen, uw persoonlijke opslaglimiet is bereikt. Neem contact op met uw beheerder."
+            },
+            "organization_quota_excedeed": {
+              "description": "U kunt geen documenten meer toevoegen, het quotum van uw organisatie is bereikt. Neem contact op met uw beheerder."
+            },
             "no_organization": {
               "description": "Uw account is niet gekoppeld aan een organisatie, dus u kunt nog geen bestanden uploaden. Neem contact op met uw beheerder voor toegang."
             },
@@ -1459,7 +1524,14 @@
             "move_to_root": "Verplaats naar root",
             "aria_label": "Map verplaatsen modal",
             "description_one_item": "Kies de nieuwe locatie voor <strong>{{name}}</strong>",
-            "description_multiple_items": "Kies de nieuwe locatie voor de <strong>{{count}}</strong> geselecteerde elementen"
+            "description_multiple_items": "Kies de nieuwe locatie voor de <strong>{{count}}</strong> geselecteerde elementen",
+            "errors": {
+              "user_quota_excedeed": "U kunt geen documenten meer naar de root verplaatsen, uw persoonlijke quotum is bereikt. Neem contact op met uw beheerder.",
+              "user_override_quota_excedeed": "U kunt geen documenten meer naar de root verplaatsen, uw persoonlijke opslaglimiet is bereikt. Neem contact op met uw beheerder.",
+              "organization_quota_excedeed": "U kunt geen documenten meer naar de root verplaatsen, het quotum van uw organisatie is bereikt. Neem contact op met uw beheerder.",
+              "no_organization": "Uw account is niet gekoppeld aan een organisatie, dus u kunt nog geen documenten naar de root verplaatsen. Neem contact op met uw beheerder voor toegang.",
+              "not_activated": "Het uploaden van bestanden is nog niet geactiveerd voor uw organisatie, dus u kunt geen documenten naar de root verplaatsen. Neem contact op met uw beheerder om dit in te schakelen."
+            }
           }
         },
         "drag_overlay": {
@@ -1744,10 +1816,20 @@
                 "file_type_not_allowed": "Dit bestandstype is niet toegestaan.",
                 "item_create_file_extension_not_allowed": "Deze bestandsextensie is niet toegestaan.",
                 "file_too_large": "Het bestand overschrijdt de maximale toegestane grootte.",
+                "user_quota_excedeed": "U kunt geen documenten meer toevoegen, uw persoonlijke quotum is bereikt. Neem contact op met uw beheerder.",
+                "user_override_quota_excedeed": "U kunt geen documenten meer toevoegen, uw persoonlijke opslaglimiet is bereikt. Neem contact op met uw beheerder.",
+                "organization_quota_excedeed": "U kunt geen documenten meer toevoegen, het quotum van uw organisatie is bereikt. Neem contact op met uw beheerder.",
+                "no_organization": "Uw account is niet gekoppeld aan een organisatie, dus u kunt nog geen bestanden uploaden. Neem contact op met uw beheerder voor toegang.",
+                "not_activated": "Het uploaden van bestanden is nog niet geactiveerd voor uw organisatie. Neem contact op met uw beheerder om dit in te schakelen.",
                 "unknown": "Er is een onverwachte fout opgetreden."
               },
               "error_short": {
-                "file_too_large": "Bestand te groot"
+                "file_too_large": "Bestand te groot",
+                "user_quota_excedeed": "Quotum bereikt",
+                "user_override_quota_excedeed": "Quotum bereikt",
+                "organization_quota_excedeed": "Quotum bereikt",
+                "no_organization": "Uploaden niet toegestaan",
+                "not_activated": "Uploaden niet toegestaan"
               }
             },
             "cancel_modal": {
@@ -1770,7 +1852,9 @@
           },
           "move": {
             "toast_one": "{{count}} item verplaatst",
-            "toast_other": "{{count}} items verplaatst"
+            "toast_other": "{{count}} items verplaatst",
+            "toast_error_one": "Er is een fout opgetreden bij het verplaatsen van het item.",
+            "toast_error_other": "Er is een fout opgetreden bij het verplaatsen van de items."
           },
           "share": {
             "modal": {
diff --git a/src/frontend/apps/drive/src/utils/entitlements.ts b/src/frontend/apps/drive/src/utils/entitlements.ts
index 9073bbd4..6c035df3 100644
--- a/src/frontend/apps/drive/src/utils/entitlements.ts
+++ b/src/frontend/apps/drive/src/utils/entitlements.ts
@@ -1,6 +1,34 @@
 import { getDriver } from "@/features/config/Config";
+import { errorToCode } from "@/features/api/APIError";
+import { EntitlementCanUploadReasons } from "@/features/drivers/Driver";
+import { getCannotUploadReasonDescription } from "@/features/entitlement-disclaimers/disclaimers/CannotUploadDisclaimer";
 
 export const getEntitlements = async () => {
   const driver = getDriver();
   return driver.getEntitlements();
 };
+
+/**
+ * The quota gates (upload, move, duplicate) expose the can_upload reason as the
+ * API error code: map it back to its localized description when known.
+ */
+export const getCanUploadErrorDescription = (
+  error: unknown,
+  translate?: (key: string) => string,
+): string | undefined => {
+  const code = errorToCode(error);
+  if (
+    code &&
+    Object.values(EntitlementCanUploadReasons).includes(
+      code as EntitlementCanUploadReasons,
+    )
+  ) {
+    if (translate) {
+      return translate(code);
+    }
+    return getCannotUploadReasonDescription(
+      code as EntitlementCanUploadReasons,
+    );
+  }
+  return undefined;
+};
diff --git a/src/frontend/apps/e2e/__tests__/app-drive/duplicate-item.spec.ts b/src/frontend/apps/e2e/__tests__/app-drive/duplicate-item.spec.ts
index 4179e9b4..ad740bbc 100644
--- a/src/frontend/apps/e2e/__tests__/app-drive/duplicate-item.spec.ts
+++ b/src/frontend/apps/e2e/__tests__/app-drive/duplicate-item.spec.ts
@@ -121,6 +121,41 @@ test.describe("Duplicate item", () => {
     ).not.toBeVisible();
   });
 
+  test("Shows the specific quota message when the duplication is rejected", async ({
+    page,
+  }) => {
+    await createFileFromTemplate(page, "TestDoc");
+
+    // Reject the duplication with the quota gate's reason code.
+    await page.route("**/api/v1.0/items/*/duplicate/", (route) =>
+      route.fulfill({
+        status: 403,
+        contentType: "application/json",
+        body: JSON.stringify({
+          type: "client_error",
+          errors: [
+            {
+              code: "user_quota_excedeed",
+              detail: "You do not have permission to upload files.",
+              attr: null,
+            },
+          ],
+        }),
+      }),
+    );
+
+    await triggerDuplicate(page, "TestDoc");
+
+    await expect(
+      page.getByText(
+        "You can no longer add documents, your personal quota has been reached. Contact your administrator.",
+      ),
+    ).toBeVisible();
+    await expect(
+      page.getByText("An error occurred while duplicating the item."),
+    ).not.toBeVisible();
+  });
+
   test("Duplicate option is available for files but not folders", async ({
     page,
   }) => {
diff --git a/src/frontend/apps/e2e/__tests__/app-drive/move-item.spec.ts b/src/frontend/apps/e2e/__tests__/app-drive/move-item.spec.ts
index 2dcd346b..5b3459d5 100644
--- a/src/frontend/apps/e2e/__tests__/app-drive/move-item.spec.ts
+++ b/src/frontend/apps/e2e/__tests__/app-drive/move-item.spec.ts
@@ -28,6 +28,96 @@ test("Move an item to a new folder", async ({ page }) => {
   await expect(JohnRow).not.toBeVisible();
 });
 
+test("Show an error toast when the server rejects the move", async ({
+  page,
+}) => {
+  await clearDb();
+  await login(page, "drive@example.com");
+  await page.goto("/");
+  await clickToMyFiles(page);
+  await createFolderInCurrentFolder(page, "John");
+  await createFolderInCurrentFolder(page, "Doe");
+
+  // Reject the move server-side (e.g. quota gate on move-to-root).
+  await page.route("**/api/v1.0/items/*/move/", (route) =>
+    route.fulfill({
+      status: 403,
+      contentType: "application/json",
+      body: JSON.stringify({
+        type: "client_error",
+        errors: [
+          {
+            code: "permission_denied",
+            detail: "You cannot take ownership of more storage.",
+            attr: null,
+          },
+        ],
+      }),
+    }),
+  );
+
+  const JohnRow = await getRowItem(page, "John");
+  await clickOnRowItemActions(page, "John", "Move");
+  const moveFolderModal = await getMoveFolderModal(page);
+  const DoeRow = await getRowItem(moveFolderModal, "Doe");
+  await DoeRow.click();
+  await acceptMoveItem(page);
+
+  await expect(
+    page.getByText("An error occurred while moving the item."),
+  ).toBeVisible();
+
+  // The modal stays open on failure; close it and check the item stayed put.
+  await moveFolderModal.getByRole("button", { name: "Cancel" }).click();
+  await expect(JohnRow).toBeVisible();
+});
+
+test("Show the specific quota message when the move is rejected", async ({
+  page,
+}) => {
+  await clearDb();
+  await login(page, "drive@example.com");
+  await page.goto("/");
+  await clickToMyFiles(page);
+  await createFolderInCurrentFolder(page, "John");
+  await createFolderInCurrentFolder(page, "Doe");
+
+  // Reject the move with the quota gate's reason code.
+  await page.route("**/api/v1.0/items/*/move/", (route) =>
+    route.fulfill({
+      status: 403,
+      contentType: "application/json",
+      body: JSON.stringify({
+        type: "client_error",
+        errors: [
+          {
+            code: "user_quota_excedeed",
+            detail: "You cannot take ownership of more storage.",
+            attr: null,
+          },
+        ],
+      }),
+    }),
+  );
+
+  const JohnRow = await getRowItem(page, "John");
+  await clickOnRowItemActions(page, "John", "Move");
+  const moveFolderModal = await getMoveFolderModal(page);
+  const DoeRow = await getRowItem(moveFolderModal, "Doe");
+  await DoeRow.click();
+  await acceptMoveItem(page);
+
+  await expect(
+    page.getByText(
+      "You can no longer move documents to the root, your personal quota has been reached. Contact your administrator.",
+    ),
+  ).toBeVisible();
+
+  // The modal stays open on failure; close it and check the item stayed put.
+  await moveFolderModal.getByRole("button", { name: "Cancel" }).click();
+  await expect(JohnRow).toBeVisible();
+});
+
 test("Search and select to move an item", async ({ page }) => {
   await clearDb();
   await login(page, "drive@example.com");