For everyday stereo board mix recordings, audio playback files, backing up the mixer scenes and show files The Kingston Data Traveler series has always worked for me.
Take it out of the package and format it in the mixer.
For multitrack you need a faster drives, the Sandisk SSD portable drives work well, I’ve used the 500gb, never tried the larger ones.
Scroll up in the post and you’ll see a link I posted to a Samsung USB stick that works for multitrack. Of course both of those work for non multitrack uses as well.
Yes the QU’s are picky on the USB drive they like.