Smart media card + USB Pen drive query

Ok, im finding that my documents in college (im an IT student) are getting too big for floppy disks, so ive started to save work to my smart media card which i use for my digital camera. However i dont like saveing work on the card because i know theres a limited amount of times you can write to them, so would i be better off with a pen drive? Or will the card be usable for many years there for resulting in it becoming pointless getting a pen drive. I dont really want to spend 30 quid give or take a few on a 128MB pen drive when ive already got a 128MB SMCard.

EDIT: i should probably point out that im using a card reader to use the SMCard and not my camera.lol