My first thought was corruption . But the error code told a deeper story.
If basic repairs fail, more drastic measures may be necessary to restore file access. Permission and Ownership Fixes dropbox error 0x80070780
: The current user account may lack the specific administrative permissions required to modify certain Dropbox-managed directories. My first thought was corruption
Before making system changes, ensure the file is intact. Log in to the Dropbox Web Portal to see if you can open the file there. If you can, the issue is strictly local. According to Microsoft Learn , this error frequently pops up when a user tries to interact with a file that hasn't finished downloading to the local machine. Ensure your sync is complete before moving large folders. 2. Run Windows Repair Tools Permission and Ownership Fixes : The current user