Sometimes the file isn’t corrupt—the emulator just lost track of it.
In the context of saving a ROM (your game file) to disk (your hard drive or SSD), the emulator tried to write data, but the operating system threw back an error that the emulator wasn't designed to handle. Common underlying reasons include: Sometimes the file isn’t corrupt—the emulator just lost
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Rare but possible: bad sectors on a hard drive, or a file system that needs checking ( chkdsk on Windows, fsck on Linux/macOS). the emulator tried to write data