Magnetic Tape, Punch cards (super old school), PuRAM Drives (mostly a military/large business storage type), Non volitale RAM Drives (Simply a board with many many ram sticks and a battery), HD DVD (Future tech), Blue-ray (Future-tech). All I can think of right now that haven't been posted yet.
These may not apply to your project, but I'm unsure. They're future-tech items. For instance, three-dimensional optical memories, Molecular storage mediums... Read it HERE
These may not apply to your project, but I'm unsure. They're future-tech items. For instance, three-dimensional optical memories, Molecular storage mediums... Read it HERE