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Description
mGBA can already load non-default save files and select different save files for multiplayer windows, but it doesn't offer any tools for managing that data. Users have to use their OS's file manager for all but the most basic operations.
Particularly for multiplayer, it would be nice to have an interface for managing save files. At minimum, being able to create copies of the main save file for multiplayer use would be valuable, but I can imagine a lot of possible other functions, such as creating and restoring save data backups.