Official comment

I'd suggest a Samsung T5 SSD instead ($139 for a 1TB T5 on Amazon with r/w speeds of 540MB/s, or get the newer T7 for $159 which has r/w speeds maxing at 1050MB/s). It's a heckuva lot faster and less expensive than comparable SD or thumbdrive options (eg. the Corsair Voyager GTX 1TB at $284, max r/w speeds of 440MB/s, or a SanDisk Extreme micro SD card costing $233 for 1TB, but only offering up 160MB/s read / 90MB/s write).
That and I've seen plenty of DJs leave SD cards in players, but almost never a USB drive.