well i know all the deal with gbc and gba backuping, there are new usb "adapters" and other methods now
but for the nes, i dont know anything that is cheap or easy.. i know there is that retron console i believe it allows someone to backup their games
to dump 100 games? it will be a lot easier to download the roms... you will have to copy the game one by one.. really dont understand why it would be easier to put one game into the reader, click and wait for the dump, eject, take the next one and repeat than download a pack with all the roms and take the ones you want
if you need help to find them, well try to search for a no intro pack (no intro packs have clean verified roms as possible), or PM me i can give ya help :winky face:
if you want to dump your personal saves, that would be understandable...