Extensions at end of game title?? What do they mean??

After unzipping a rom for the snes there are like a dozen different files and all of them have different extensions like [01] [f1] [!] [f1+2C]. What do these mean and which one am I suppossed to pick to put on my card to play?

They are codes to let you know that various things about the rom version.https://www.romulation.org/forum/index.php/topic,10399.0.htmlThis topic has a good post about it. Translations, Hacks, etc.