Save converter
RetroArch calls a cartridge game's save .srm; most standalone emulators and flash carts call it .sav. For SNES, Game Boy, GBA, and NES games they hold the same data, so converting is mostly a rename, with one catch for GBA games that have a clock.
It renames the file and keeps the bytes, except for one case: mGBA adds 16 bytes of clock data to the end of saves from games with a real-time clock (Pokémon Ruby, Sapphire, and Emerald, for example). RetroArch's cores and VBA-M don't expect it, and VBA-M quietly starts the game with an empty save, so the converter removes it. The game sets its clock again.
Name the converted file exactly like your ROM, with the new extension, and it loads.
.srm. Use the N64 save converter..dsv files have a footer. Use the DSV to SAV converter..srm is a memory card. Use the PS1 memory card converter.Converting is a one-off. If you play the same games on more than one device, SaveSync keeps the saves in step between them through RetroArch's built-in Cloud Sync, and keeps the 20 newest versions of each.