I have been receiving this message recently on my home pc when i turn on usb storage. Has anybody else had this issue? I am able to access the files off my sd card through the phone (i can see all the music etc) and when I use Wondershare MobileGo, a program that allows me to backup all my apps, contacts, texts, audio, video, etc..... I am able to see the files and back them up. In terms of the settings, i haven't changed anything that I know of and have the official OTA B885 rom, so haven't messed about with roms or rooted the phone. Turning on usb storage used to work fine. Any advice on how to resolve the issue is much appreciated, thank you.