To Disk — There Was An Unhandled Exception Trying To Save Your Rom
: Ensure your storage drive has at least a few gigabytes of free space. If you are using an external USB drive or SD card, right-click the drive in This PC , select Properties , and ensure the File system is formatted to NTFS or exFAT rather than FAT32. Summary Checklist Why It Helps Run as Admin Bypasses standard Windows user account restrictions. Relocate Folders Avoids protected directories like Program Files . Check Antivirus Stops security software from blocking file modifications. Uncheck Read-Only Allows the emulator to overwrite files on the disk. Free Up Space
The most common cause. If your hard drive or SSD is full, the emulator cannot write the save file. Even a few megabytes of free space may not be enough if the emulator needs to write temporary files first.
Windows has a built-in feature designed to stop ransomware from changing your personal files, but it frequently stops legitimate gaming utilities too.
Windows heavily guards system folders like Program Files and Program Files (x86) . If your emulator or ROM hacking tool is unpacked here, it will often fail to create new save files. : Ensure your storage drive has at least
An "unhandled exception" occurs when the emulator tries to perform this writing operation but hits a wall it cannot climb. Because the software does not have a specific routine to handle the specific problem (e.g., "the folder is write-protected" or "the disk is full"), it crashes and throws a generic exception error to protect your system.
After changing, create a new save in-game to test.
If you’ve tried all steps and the error persists, consider: Free Up Space The most common cause
Open and navigate to Virus & threat protection .
Manually copy your Battery or Save folders to a safe location weekly.
Scroll down to and click Manage ransomware protection . Locate the toggle for Controlled folder access . right-click the drive in This PC
If the error appears only with one specific game, the save file itself may be corrupted.
: Using a ROM that has been pre-modified (a "ROM hack"), trimmed, or is from an unsupported region often triggers this exception.