Summary: I used this flash drive to back up data maybe about 10 times over a 10 month period. Suddenly the computer (multiple computers) could find no data on the flash drive......just disappeared. "You need to format the disk before you can use it" error message appeared. Even after reformatting (and loss of all data that was supposed to be on the drive) the same problem occurred....
Stopped working on my Mac after I plugged it into a Windows computer (even without formatting)
27 November 2013
Summary: I really like the design of this thing and have received many compliments on it. However, it started acting after I used it in a Windows computer a couple of times (without re-formatting or otherwise doing anything like that). Now, when I plug it into my Mac, it won't recognize it anymore. I had to use my husband's Windows computer to move the files to another flash drive. Before that, I was very pleased with everything.
Summary: I have been using it for all this time. I have no issue with it. It is a very good product, fast and fits to my needs. Update 12/28/13: I changed my rating from previous 5 stars to 2 stars. After 8 months of moderate using, the USB flash drive suddenly stopped working. Format did no good. Fortunately I had kept a backup copy for all data. Amazon provided the best customer services ever. Without any questions asked Amazon refunded the purchase in full.
Summary: There weren't many negative reviews about this drive when I got it, but I saw sad stories for most 32-64 GB flash drive models. I wanted this one and my chances didn't look too bad. The first one worked for 1/2 a day before I started getting error messages and suggestions to format the drive. 3 computers each produced a similar result and 1 didn't recognize it at all. I attempted reformatting it when all-else failed.