RB 2.2.4 - when I try to update my flashdrive, I see only preparing and nothing happen win7

Hi,

I'm using RB with my XDJ-R1 and 2000 NXS in club where I play.

When I put track to flash drive for first time, everything is ok. When I put new tracks and playlists, exporting is ok but when I remove flash drive in RB, it give me classic box preparing with progress bar and nothing happen. Does any one have same issue?

Win7

XDJ-R1

RB 2.2.4

flashdrives - corsair and verbatim