I went by CC to pick up the pack of 5 RAM disks for $20. I noticed they sold also Memorex Type 2 RAM disks for $2 each. They had 2 so I bought them also but have no idea what or how they work. They are supposedly removable but are in a cartridge of sorts. Are these usable? For $2, they seem to cheap to be worthwhile, but would make nice coasters I suppose.