If you are running a of Dolphin? I can provide targeted steps based on your specific setup! Share public link
the software is unable to save or update the virtual file system metadata (the File Selection Table, or FST) on the emulated Wii NAND . This is most often a permissions issue
Go to > Update & Security > Windows Security . Select Virus & threat protection > Manage settings .
Which (Windows 10, Windows 11, macOS, or Android) are you using?
Open your main installation folder (the one containing Dolphin.exe ). dolphin iosfs failed to write new fst
If the error started occurring immediately after a Dolphin update, as some users have reported, a new bug may have been introduced. You can temporarily revert to a known stable version.
If running as admin fails, your User profile might not own the Dolphin folder.
Updating Dolphin can sometimes redirect its data directory to an inaccessible path or leave the old folder permanently marked as "Read-Only".
Click , select your user account, and check the box for Full Control . If you are running a of Dolphin
Your Dolphin global user configuration folder. This is typically located at C:\Users\[YourUsername]\Documents\Dolphin Emulator\ or inside %appdata%\Dolphin Emulator\ . 2. Fix Write Protection and Folder Permissions
If Dolphin is installed in a system-protected folder like C:\Program Files (x86) , this can cause permission headaches.
Ensure you are running the frontend as an administrator unless Dolphin is also explicitly configured to run as an administrator. Mismatched execution permissions will prevent the frontend from allowing Dolphin to write files. Fixing the Issue on Android Devices
Create a brand new folder on the root of your drive (e.g., C:\DolphinEmulator ). Move your Dolphin installation files into this new folder. This is most often a permissions issue Go
Here is the complete text explaining the cause, the technical details, and the step-by-step solution to fix it.
How to diagnose (ordered, actionable steps)
Try these solutions in order to get Dolphin running smoothly again on your PC. 1. Change Windows Security Settings Dolphin Ios-fs Failed To Write New Fst