: Ensure the Dolphin installation and user data folders are not set to "Read-only" . Right-click the folder, select Properties , and uncheck the Read-only attribute.
Temporarily disable your antivirus or add the Dolphin Emulator folder to your exclusions/exceptions list Restricted Folder Permissions: The folder where Dolphin stores its data (usually Documents/Dolphin Emulator ) might be set to "Read-only". Right-click the folder, go to Properties dolphin ios-fs failed to write new fst
Another frequent cause is . If the virtual SD card, NAND (flash memory) dump, or save file is damaged, the FST may become inconsistent. Additionally, running two instances of Dolphin simultaneously, or forcing the emulator to close while it was writing data, can leave the FST in a locked or partial state. On networked or cloud-synced drives (e.g., OneDrive, Google Drive, or iCloud Drive), synchronization locks can also prevent Dolphin from exclusively accessing and rewriting the FST. Finally, disk space exhaustion remains a simple but overlooked trigger: if the host drive is full, no write operation can succeed. : Ensure the Dolphin installation and user data