How to fix Error 365 on Windows 11

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Windows 11 Troubleshooting Guide: Error 365 – “The Cloud File Property Is Too Large”

Why This Error Happens

Error 365 occurs when a file synced through a cloud provider (such as OneDrive) using the Cloud Files API exceeds the maximum allowed size for custom file properties or metadata stored in the placeholder file. This typically happens when extended attributes, tags, or custom metadata attached to a file surpass the 4KB/8KB limit imposed by the Cloud Filter Driver (cldflt.sys). It can also occur due to corrupted placeholder metadata or a sync client attempting to write oversized property data during reconciliation.

Step-by-Step Resolution Guide

  1. Pause Cloud Sync Temporarily
    Right-click the sync client icon (e.g., OneDrive) in the system tray, select Pause syncing, and choose 2 hours to stop active reconciliation while you troubleshoot.

  2. Identify the Problematic File
    Open Event Viewer (Win + X → Event Viewer) and navigate to:
    Applications and Services Logs > Microsoft > Windows > CloudFiles-Diagnostic
    Look for Event ID 365 entries and note the file path referenced in the details.

  3. Strip Excess Metadata from the File

  • Right-click the affected file → Properties → Details tab.
  • Click Remove Properties and Personal Information → Remove the following properties from this file → select All → click OK.
  • This clears custom tags, GPS data, or extended attributes that may be inflating the metadata size.
  1. Reset the Cloud Sync Client Cache
  • Close the sync client completely (End Task via Task Manager).
  • Open Run (Win + R), type %localappdata%\Microsoft\OneDrive\settings, and rename the folder (e.g., settings_old).
  • Restart the sync client to force it to rebuild sync metadata and re-download placeholders.
  1. Move the File Outside the Synced Folder and Re-Add It
    Cut the problematic file from the cloud-synced directory, paste it into a local (non-synced) folder, then manually re-add it to the synced folder. This forces the creation of a fresh placeholder with reset metadata.

Alternative or Verification Steps

  • Verify the Fix: Resume syncing and check the sync client’s activity center for the file — if it uploads/downloads without triggering Error 365 again, the issue is resolved.
  • Alternative Fix: If the error persists, run sfc /scannow in an elevated Command Prompt to repair corrupted system files related to the Cloud Filter Driver, then restart the PC and retry the sync.