USB 3.0 32GB SanDisk Ultra Fit up to 100 MB / s (SDCZ43-032G-G46) (Personal Computers)
I use this key every day, and even if it heats a little (normal for the tiny size but nothing to burn either), it is much faster on a USB3 port on a USB2 port (between two three times faster on my PC gamer MSi GT60). I do not regret my purchase.