CDJ2000 and Rekordbox

I am trying to put some music I have bought from Beatport onto a USB stick - a brand new USB stick from San Disk that is ex-FAT32 format. The USB stick is not recognised AT ALL when out into the CDJ2000 machine.

I have imported the tracks into Rekordbox and analysed them (with free Rekordbox). I now need to get the tracks exported onto the USB stick to see if they will be picked up by the CDJ when it is plugged in. However, I am now being asked to convert all my tracks to OneLibrary and a message pops up stating which equipment is compatible with OneLibrary (I cannot see that the CDJ2000s are).

Can anyone help please? I'm getting really pissed off as to why the whole process is so faffy and time consuming... I also do not want to pay for a f...ing subscription service to play my own music that I have just bought. thanks in advance...