Consider adding a dropdown to allow user to change output file extension to .srm/.sav/etc

[euan-forrester]

There is considerable confusion about file extensions, and many users expect that a file will not work because the outputted file extension doesn't match their expectations, despite the contents of the file being exactly what they're looking for.

Many users are uncomfortable changing the extension on their own, and will only do so after prompting. Thus they just assume that the site does not meet their needs.

Making a dropdown containing common extensions may allow these users to feel more comfortable.

[euan-forrester]

Examples:

• Gameshark output being .srm rather than the expected .sav for the My Boy emulator
• Goomba output being .esv rather than the expected .srm for a GBA Everdrive

[euan-forrester]

Note that there are some output platforms to which this wouldn't apply because we know the extension with certainty:

• MiSTer
• MegaSD
• Mega Everdrive
• Nintendo Switch Online
• Retron5

But converting to raw/emulator from those platforms would still need this dropdown. So it would need to be on every screen

[euan-forrester]

There's a couple of different extensions for PS1 memcard images: .mcr and .mcd (for Duckstation)

[euan-forrester]

Similarly for N64 memcard images: .mpk and .cpk (for the MiSTer)