OneDrive Storage Space keeps Filling up

1. Use the Disk Clean-up utility (Start > Disk Clean-up in Windows, or Optimize Storage in Mac) to free up some working space for OneDrive.
2. Move your files into the OneDrive folder.
3. Click the OneDrive taskbar/menu bar icon and open OneDrive > Settings > Account > Choose folders to make sure you don’t sync any unwanted files to your computer.
4. Empty the OneDrive Recycle bin.
5. Re-install OneDrive and turn off the sync.
6. Delete unnecessary files from the OneDrive Web and empty the Recycle Bin.

It’s possible that you may have deleted files from your computer but they are still present in your OneDrive Recycle bin, which is taking up space. You can empty the Recycle bin by following step 4 above.

It’s also possible that you may have synced a large number of files to your OneDrive without realizing it. You can check which folders are being synced by following step 3 above.

If none of the above steps work, it’s possible that someone else has gained access to your account and is using your storage space. In this case, I recommend changing your password immediately.