I have owned one of these thumb drives for over a year now and constantly carry it in my jacket pocket and use it on the average of about twice a week to transfer a variety of different files from simple word documents to photographs, software related files, etc. and have had absolutely no problems with it. Other than at times wishing it had the capacity to hold at least another 4 or 5 gigs of information.The only negative thing that I have had happen is that occasionally when transferring file it will sometimes come up with an error message concerning a certain file. When this happens I merely disconnect the thumb drive and then reinsert it and download the files again. This happens rarely, maybe once every 20 or 30 times.Shawn KovacichMartial Artist/Author of the Achieving Kicking Excellence series.