[CLOSED] Problems with USB conection

hi, 

I´m having a problem with USB conection!

I have 2 cdj 850, and play with 2 flashdrives ( 1 HP 16Gb and 1 Sandisk 16Gb) both with the same tracks, last weekend i used the rekordbox to analyse both flashdrives, when my problem started! One of my cdjs stoped to read my flashdrives, i conect the flashdrive in usb of my cdj and nothing happen.

At first time i imagine that problem was in my cdj, but i conected other pendrive with music not analysed by rekordbox and the cdj read normal.

My flashdrive is formated in fat 32.