Ah, yes, to init a card with MyBIOS, you need to work on the atari first.
Once all is setup, you can transfer files etc on the PC.
But for now, you can stick to FAT32-only. (?)
Just format on the PC, put your favorite games on the card and use the atarimax fat32-loader.
When you want to use MyBIOS, you need a working keyboard.
Later,
Sijmen.