[mikethedruid]

Dear AV, you have learned the hard way what those of us who have used computers since the early days had drummed into us from early on. Keep you data files on separate media from your hard drive, or at least back the data files up regularly on separate media. I suggest that if your excel spread sheet worked well for you that you use one again. This time back it up on a thumb drive. I would have said floppy disk, but not many people have them in their computers any more. I am not familiar with Excel, but if it can, include a library of the pictures of your radios on the thumb drive, and have a links to the photos of each radio in the line for that particular radio. Finally, if you do not keep the first, working copy of your data file on the hard drive, then keep two copies on two different thumb drives just in case one has a problem some day, you will always have a good one to keep going.