I've got a SanDisk with the little square 128mb card. It's great! I use it for carrying the files from machine to machine. I do the work on my hard drive however, not to the disk. I actually added more than 128 and couldn't save back. I've been using one over a year and must have swapped work around over 100 times, no problem. I can buy 2 ea 100 spindles of 800mb cdr's for the same price. It's only 50 cents per copy. The disks are harder to carry though and have to have a CDR and software to function. Most portable CDR's are noisy too. If it's only about money buy CDR's, if its about convenience, size, buy the USB pen.