Dolphin Iosfs Failed To Write | New Fst
Scroll to and click Manage Controlled folder access .
Go to > Update & Security > Windows Security . Select Virus & threat protection .
The error "IOS_FS: Failed to write new FST" (or the similar "Failed to rename temporary FST file") signifies that Dolphin cannot modify files in its designated User directory. This is common after an update if the emulator's folder permissions change or if security software flags the frequent read/write activity as suspicious. Step-by-Step Solutions 1. Adjust Windows Defender Settings dolphin iosfs failed to write new fst
The most common cause is Windows Defender's , which prevents unauthorized apps from writing to the "Documents" folder where Dolphin typically stores data.
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 Scroll to and click Manage Controlled folder access
Either turn it or click Allow an app through Controlled folder access and add Dolphin.exe to the list. 2. Run as Administrator
: You can also use the Dolphin registry key to point the UserConfigPath to a new location, such as C:\DolphinData\ , though this is more advanced. 4. Check Antivirus Exclusions The error "IOS_FS: Failed to write new FST"
If your "Documents" folder is restricted or synced with OneDrive, moving the data can stop the error.
