I've had a Samsung T7 1tb drive since I bought my 2018 S last Nov., and set it up from some instructions I saw online. Today I decided I'd load some FLAC music to my previously created "Music" folder but couldn't find USB in 'media'. Then I realized USB never showed as an option despite zero issues recording dashcam/sentry stuff. So I followed the Tesla instructions to format within the vehicle and could now see USB appear in Media. I go back to my PC and it doesn't recognize the drive, yet it allows me the option to format it as exFAT. I do that, manually created the TeslaSentry folder but lo and behold my car no longer sees it as a USB in Media! So I have no way to drag/drop FLAC files onto it either way.