I've used many SanDisk Cruzer USB flash drives over the past few years. I've always trusted this brand for reliability with memory and in operation. I've never had any problems with losing or corrupting files or damage to my computer. This flash drive holds a lot of files. They really help me stay organized, as well as transport and store my files. I've even dropped one pretty hard before and it kept working and there was no damage. While the SanDisk Cruzer does have a retractable USB plug, I wish they came with a cap. I have one USB that has a cap and I like it because I know that nothing is going to get crammed inside it while in my drawer or my purse. I do worry about the exposed end with the Cruzer. I would add that I recently discovered that you need to "eject" your USB flash drives from your computer before pulling them out. I always thought that was optional, but I was told that it helps prevent problems with your flash drives and your computer. So now, I always eject my SanDisk flash drive, because I want to make sure I take care of it, since it is doing sure an awesome job of taking care of things for me!