Thumb Drive for playing music in car?

I'd like to transfer music from some cds (.wav files) to a thumb drive, to play in the car.
What kind (and brand,) of thumb drives are the best for doing this? Thanks for helpful advice!

 

https://www.amazon.com/gp/product/B077VYCV37/ref=ppx_yo_dt_b_asin_title_o03__o00_s00?ie=UTF8&psc=1
Small enough that my Lexus privacy door still closes over my aftermarket radio.
Be aware that in my case there is no directory information and all I can do is sequential/random/shuffle playing. I do use a low cost tablet with a microsd card, load my music on it in the appropriate format, and access it through bluetooth to have more search, etc options.

 

I've got a Cooper Mini Convertible with the drive slot sticking up out of the little cubby-hole space underneath the radio. So, just about anything fits. I use those 32g USB 3.0 flash drives by Lexar you get at Costco in a three-pack. If I have all .wav files on them, I mark that. Same with .flac. For Christmas/wintertime selections, I stick either a little green smiley-face on a red one, or a red one on the green one. I suppose I could stick a yellow one on the Summertime-top-down music, but - eh. I'm goin' for a drive...