512 GB USB Flash Drive USB Memory - Stick USB 3.0 Waterproof - Jump Drive Pen Drive with Keychain Large Data Storage Compatible for Computer/Laptop Thumb Drive (Black)

Large data store

I've been trying to set it up for a day now and it is simply not working. Lap top recognize it, and it ask for format before use, and no matter what I try it won't format. Useless.

Not too much good

Thank you good product and big strong