Are you sure it's FAT32 and not exFAT?
Rekordbox stopped recognizing USB in Export mode
Rekordbox v6.0. Corsair USB formatted FAT32.
It still shows up folder contents in Performance mode under "Explorer" menu. However, in Export mode the "Devices" menu is empty.
I've checked Security and Privacy settings on Mac and yes, it allows rekordbox to work with Removable volumes. So it must be something else here.
The USB worked ok, but suddenly it was ejected and after that it doesn't show up in the devices section. Is there an option to recover it without formatting the drive?
Without knowing why it's not reading... no, sorry.