XDJ RX freezes

While using the cue points at a gig last night the display flashed "usb is full" did that every time I tapped a cue point. Low and behold the unit completely freezes on me. My usb stick is brand new 128g and contained about 20gb music. This happened twice during the night. Outright freaked out about using it again. I purchased it this week from Sam Ash. If I don't get resolution I will have to send it back.