Hi Matthew,
This message usually appears when OneDrive detects sync conflicts or corrupted placeholders that a reset can’t automatically fix. Here’s what’s going on behind the scenes:
A reset clears local cache and reinitializes sync, but if certain files have invalid names, permissions, or incomplete uploads, they remain flagged.
OneDrive doesn’t currently offer a built-in feature to list all errors in one place, which makes troubleshooting harder.
These errors are typically related to:
Files that failed to upload due to size or name restrictions.
Items with special characters or reserved names.
Sync conflicts between local and cloud versions.
So, the issue isn’t that all your files are lost it’s that some files couldn’t sync properly and need attention.
Here are steps that usually help identify and resolve these errors:
Check OneDrive’s Sync Status
Click the OneDrive icon in the taskbar.
Go to Help & Settings → View sync problems. This is the closest option to listing errors.
Verify on OneDrive Web
Visit https://onedrive.live.com .
Check your most important folders to confirm they’re present in the cloud.
Look for Red X or Warning Icons
Enable Files On-Demand in OneDrive settings.
Files with sync issues will show a red X or warning icon in File Explorer.
Common Fixes
Rename files with special characters (e.g., <>:"|?*).
Move files out of restricted folders like Program Files or system directories.
Ensure you have enough storage space in your OneDrive account.
This is a limitation in OneDrive’s error reporting, not something you did wrong. Microsoft currently doesn’t provide a simple integrity check tool, which is why these steps are necessary.