Create Max File Upload Size.md

docs/docs/help/FAQs/Max File Upload Size.md

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+## 📂 Max File Upload Size FAQ
+
+### ❓ What is the default validation size if nothing is set?
+- For Selfhost User the maximum allowed file size is **80 MB**.
+- For Cloud User the maximum allowed file size is **10 MB**.
+*(Note: There is an extra +10 MB added in limit to prevent unexpected signing failures)*
+
+---
+
+### ❓ Can the file size limit be increased for specific users?
+Yes. On demand, the maximum upload size can be increased **up to 90 MB**.  
+*(Note: There is a hard restriction of **100 MB** at the server level.)*
+
+---
+
+### ❓ What happens if a file exceeds the max size?
+If a file exceeds the allowed size:
+- The upload is rejected.
+- An appropriate validation error is returned to the user.
+
+---