Scroll to and click Manage Controlled folder access .
The most common cause is Windows Defender's , which prevents unauthorized apps from writing to the "Documents" folder where Dolphin typically stores data. dolphin iosfs failed to write new fst
If your "Documents" folder is restricted or synced with OneDrive, moving the data can stop the error. Scroll to and click Manage Controlled folder access
Go to > Update & Security > Windows Security . Select Virus & threat protection . right-click the file again
If this fixes the issue, right-click the file again, go to > Compatibility , and check Run this program as an administrator to make the fix permanent. 3. Change the User Directory Location
