The error ios-fs failed to write new fst in Dolphin Emulator indicates a problem with the emulated Wii System Menu trying to update the File System Table (FST). This usually happens when you are installing a WAD (Wii Channel), updating the Wii System Menu version, or attempting to save settings within the Wii Menu.
To prevent similar issues in the future, we recommend: dolphin ios-fs failed to write new fst
The iOS port of Dolphin is not as mature as the desktop versions. Some older builds (especially from early 2023) had known issues with FST caching on iOS. Newer builds have improved filesystem handling. The error ios-fs failed to write new fst
Update Dolphin: Ensure you are using the latest Beta or Development builds from the official website, as older stable versions (like 5.0) may have bugs related to modern file system permissions. Old or Buggy Dolphin Builds The iOS port
The most common solution for Windows users is adjusting Windows Security settings:
External security software or strict operating system file permissions prevent Dolphin from completing operations on temporary files or updating the active file tree.