If the quick fixes don't work, ensure your Dolphin user folder isn't set to "Read-only": Locate your Dolphin user folder (usually in Documents\Dolphin Emulator Right-click the folder and select Properties tab, ensure your user account has Full control 📱 Android Troubleshooting If you are on Android, this is often a Scoped Storage Grant Permissions
This error typically appears in (used to play Nintendo GameCube and Wii games on other platforms, including attempts on iOS or related to iOS file systems). It means the emulator tried to update its FST (File System Table) — a cache file that stores directory structures of a game disc — but failed to write the new version.
: Right-click the Dolphin executable and select "Run as administrator" to bypass most standard permission restrictions.
File System. This is the code responsible for managing how data is stored, read, and modified on the virtual Wii internal memory (NAND) and SD card. dolphin ios-fs failed to write new fst
: On Windows, this security feature may block Dolphin from making changes to the Documents folder where user data is typically stored.
Right-click your Dolphin folder, select , and ensure the Read-only box is unchecked. 5 Bypass OneDrive
Ensure your game is in .iso , .gcm , .wbfs , or .rvz format. Avoid heavily compressed formats like .7z , .zip , or .rar inside the app; extract them first using an app like Files or iZip . If the quick fixes don't work, ensure your
Temporary disable real-time protection and test. If the error disappears, add Dolphin’s entire folder to your antivirus exclusion list.
On the third dive, an old engineer named Maris volunteered to ride Dolphin's diagnostic thread. She had once been a poet before she learned to speak in kernel panics and checksums. In the control room, with warm coffee turning cold in her hands, she scrolled through the probe's last transmissions. Among the binary waves, she found odd packets: patterns that didn't match sensors. They were rhythmic, almost musical — a sequence that repeated like whale song, but compressed, encoded inside routine telemetry.
Add the Dolphin installation folder and the user data folder (usually Documents\Dolphin Emulator ) to your antivirus exclusion list. Disable Controlled Folder Access File System
To prevent similar issues in the future, we recommend:
Here is a comprehensive breakdown of why this error happens and exactly how to fix it. What Causes the "Failed to Write New FST" Error?