CDJ-850 with SanDisk Extreme Pro 128GB USB3.2

Hi there, 

I am just testing out my new SanDisk drives on a pair of 850's - they are formatted to FAT32 and load just fine. When I am trying to play a track a message "USB ERROR" appears but the track still plays anyway. I am just worried about the USB failing on me while playing out so checking if this might be something to worry about or if there is a way to fix this?

Thank you!