JNC DVR SSF 2

Question

Dear Expert, I get problem with my digital voice recorder (JNC DVR SSF 22). I wanted to uploaded my recorded files into my PC, but it took long time for "gathering file information" and it then stag (not responding). The screen remainded stag with apperance of "USB and Disc".I have 10 very important files in this DVR. I am so desperate with this problem. I would very much appreciate if you could assist me on this matter. Hendra