Recommended USB flash drives
Fast USB flash drives. I have tested many different USB flash devices, commonly referred to as UFD, pen drives, thumb drives and memory sticks. I have come to the conclusion that there are some that work great and others that don't. This page lists only the USB Flash Drives I personally use and highly recommend.
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My Pick of the Best Fast USB Flash Drives
These are what I currently use for YUMI and UUI development and testing. They support USB 3.1, are phenomenally fast, and provide plenty of storage space for Linux distributions, Windows to Go, Windows Installers + anything else one might want to store on them. The SanDisk Extreme Pro may not be cheap, but from what I've found are of very high quality. As the old saying goes, you do get what you pay for.