I had once transferred files from public folder in my company´s server to usb flash. It was still processing and had not finished when I left my pc for lunch. When I came back everything had gone ( I was opening xl, word, and some pages of website). I thought the electricity was out of order,but no! We have ups. I noticed some warnings on the screen. As I tried to open my flash to check if the transfer was ok. This message apeared on the screen: "the disk drive is not formated. do you want to format now?". I tried on other PC and the same message appeared. I have then browsed in Yahoo to find freeware software. I found two in www.easyfreeware.com : "Smart Flash Recovery" and "UndeleteMyFiles 2.5". Are they safe to download? Which one is easy to work with? Thanks