I made the mistake and bought 4! They have been driving me crazy... It takes 45 minutes plus to transfer a 70mb file. I don't want to know how many days it will take me to empty it. I filled them once and since then I regret it. It doesn't delete files, it can't transfer them, whatever it transfers, it transfers them halfway and they don't open, all the pdf and excel files are damaged, plus it constantly says that it can't transfer the folders because they have huge names... and we're talking about a folder with one word. Get Kingston, I've had them since the biggest flash drive was 4GB and they still work fine. That's it.

Useless USB stick. Very poor build quality, I left it in the car during the summer and all the glue that held the USB on the plastic casing melted, took me a while to clean/repair. I left the stick in a drawer for a few months, recently opened it on my PC to see if it works, all the songs are corrupted. Also very slow in file transfer.

It broke from the first day. It played for an hour and then neither the computer nor the car's audio system could see it.
I took it back to the store where I bought it, the people were polite. They replaced it and gave me a new one. And with the new one I got the same problems again. Stay away, everything is problematic.

Excellent with speeds of 60000Kb/s and 80000kb/s for writing and reading respectively. The measurements were taken on usb3.0 with the usb flash toolkit

Awesome. Fast, durable, and very compact. Secure it well to keys or something similar, so you don't have the unpleasant experience I had and it falls off.