If your "Documents" folder is restricted or synced with OneDrive, moving the data can stop the error.
Running Dolphin with elevated privileges can bypass basic permission blocks. Right-click the Dolphin.exe file. Select .
Click under "Virus & threat protection settings". dolphin iosfs failed to write new fst
Either turn it or click Allow an app through Controlled folder access and add Dolphin.exe to the list. 2. Run as Administrator
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 If your "Documents" folder is restricted or synced
To resolve the error in the Dolphin emulator, you typically need to address file write permissions or antivirus interference . This error occurs when Dolphin is blocked from updating the virtual Wii NAND metadata (FST files), which it uses to track saved data and content. Why This Error Happens
Third-party antivirus programs (like Avast or Bitdefender) may block Dolphin's constant read/write cycles. Failed to rename temporary FST file" errors after update Select
: 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