正式なコメント
Buy the best / fastest drive you can afford. The Data Traveller drives aren't exactly high-performance. I personally recommend using the SanDisk Extreme Pro USB drives, or if you want to go larger, a Samsung T5 or T7 SSD are blisteringly fast and can hold terabytes worth of data.
Side note: CDJs also support HFS+, which is preferred thanks to journaling as it can help prevent file corruption.