Carrying files back and forth to werk. (I'm retired......
Or just between different computers.
I use them to transfer files like pictures or some programs.
That's what I had in mind for the principle use. My wife doesn't have a scanner or net access on her computer, so when she needs to do church stuff, I can use a stick, and port things back and forth.
I don't think they are reliable enough for doing important back-ups, I use online and DVD's for back-ups.
I checked user reviews on Amazon, and ordered a 4g Transcend JetFlash 300. It had the least number of complaints. I agree that reliability can be an issue with sticks. Online backup is something I don't like, and CDs are kind of klutzy IMO.
Meanwhile, I'm gonna play around with this SanDisk.