If I open up rekordbox it only shows up in explorer, not in devices. The usb is formatted in FAT32 and rekordbox has full disk allowance.

When i plug my usb in, in a windows machine, rekordbox recognizes it as device, as it should be, but why doesnt it work on my mac?

I look up the privacy settings and rekordbox is allowed to use external devices. 
The usb is working perfectly just dont recognized by rekordbox in the devices tab.