Offizieller Kommentar
Sadly, the HyperX is a fast drive for large files, but then absolutely falls flat when it comes to the read/write of small files -- which it has to do with rekordbox when it comes to the waveform, cue / memory data, and album art.
There's no special requirements, but I only personally recommend the SanDisk Extreme Pro USB 3.0/3.1 units, or the Corsair Voyager GTX. I have tested dozens of different makes and models of USB drives and those two are the only two I would ever use.