No, Carl, but like other media, they will fail eventually. I use sd cards for video. They have become very large. The last one I bought was 32 gigs. If it fails, I lose a lot of video that i can't reproduce. I take it off as soon as I can and back up my files, but if it fails in the field, I lose a lot. Makes one want to use small cards. Backing up our data is important no matter what media it is on, including flash drives. They work as a backup, but if the primary data source, then it needs to be backed up. I have heard stories about the manufacturing of various drives that has me concerned also, but have not had any flash are card fails yet. I am waiting. Thanks for sharing.