Windows Security > Virus & threat protection > Manage settings > Exclusions Other Common Culprits OneDrive Sync : If your Documents folder is syncing to
: Windows Defender's "Controlled folder access" can block Dolphin from writing to your Documents folder. You can disable this in Windows Security > Virus & threat protection > Manage ransomware protection . dolphin ios-fs failed to write new fst
For many desktop and mobile users, a simple string length or path glitch in the user directory causes the FST file creation to fail. A widely verified community fix involves shortening the directory path name: Close the emulator entirely. Windows Security > Virus & threat protection >
By methodically clearing cache, freeing space, verifying game integrity, and updating Dolphin, you can resolve the error in under ten minutes. For persistent cases, switching game formats or rebuilding the virtual Wii NAND will restore full functionality. A widely verified community fix involves shortening the
If you see the "IOS_FS: failed to write new FST" or "Failed to rename temporary FST file" pop-up:
is a File System Table. Dolphin constantly reads and writes to this emulated environment to manage saves, system settings, and operations. Why it happens:
The error is a filesystem caching issue specific to Dolphin on iOS, usually caused by permission restrictions, low storage, or corrupted game files. The good news is that it is almost always fixable without losing game progress.