FAQ

Answer:
The specific answer with respect to 32 gig drives is that I don't know because I don't buy cheap drives of that size. The answer you are looking for is "probably not." I buy and give away a lot of 4 gig drives. A 4 gig drive contains space for 4,018,110,464 bytes. That's why it's called "4 gig." In actual fact, because an actual gigabyte is larger than 4 billion entries, a 4 gig USB stick accepts 3.79 gigabytes of data. If you actually have a file or files which total 32 gigabytes it/they will not fit on a "32 gig" drive. This is not bait and switch or any other nefarious form of product description; it is a result of the nomenclature the entire computer industry has adopted to please the marketing arms of the various companies. An even more glaring example of this is processor speeds.
Answer:
I believe they do comply with UMS. Although I don't know this for a fact. I put mp3 audio files on mine and play them in my car as well as on other devices that support USB devices. I've never had a problem. I even put groups of files in separate sub-directories - based on album name or artist. All my devices read the USB drives correctly - including all directory content.

Answer:
Support PC Mode: all brands of PC, Laptop, HP, Dell, Toshiba, etc
Compatibility: Desktop, Laptop, Macintosh, Tablet, Speakers and other device with USB ports
Operating System: Windows ME/NT/ 2000/XP/7/8, Linux, Mac OS