My sister and I have identical Verbatim 8 GB Store and Go USBs. Mine received the error "The disk in drive F is not formatted. Do you want to format it now?" I searched the Internet without luck for a solution. Test Disk was no help or I couldn't figure it out. One program I ran (I forgot which) says it detected no boot drive. I downloaded ARDC Data Recovery Tools and see it says you can import and export boot sector data. If I import the boot sector data from my sister's USB into mine, will it work again perfectly without harming either one? - or would that be too simple? I have important data on the drive. I had been emptying a possibly dying Windows 98 computer, and some of it is not backed up. I thought the USB would last long enough to do that. It is less than a year old. Thanks VERY much to anyone who can help.