I was editing some off air material and deleted the sub-directory on the wrong computer. Some of these where new files and not yet backed up. The source for the edits had already been over written. I have Microsoft Home Server. I took the drives out of the computer and external 4 drive housing and used RecoverMyFiles to look for the files on a desktop PC. The videos had already been spread across three drives but I was able to recover them all. The software was more than the data was worth - a DVD will be release this year. My existing version of the software could not find these files. But at least the latest version does work and will be useful again in the future. I have used RecoverMyFiles to search through a dying drive that wouldn't allow access to the directories. I needed to check what I had lost and not backed up. I could recover files particularly documents and databases but not video. I was able to list what I had lost and to re-do the work. I was able to check that I had not lost anything important.

You have just listed part of my media library. and I guess I should look further into the two I haven't come across.

I have 14 x 2Tb of storage. 25Tb of data. My solution is to have a back up system. I do a refresh every week or so. It isn't perfect. I have had JPEG images get corrupted and the back up process copies the fault over. Some videos get damaged but knowing it that is hard as you can only really see when you watch the 90 minute 2 hour film. A way would be to do a CRC check and repeat that monthly - very tie consuming. The back up system saves some damage and the accident deletion but they are in the same room. The next stage is for a third system that is swapped out with the 1st back up system every month and stored somewhere else. If the material is commercial - ebooks, transfers of DVDs and CDs for streaming then it could be built up again. All the family home movies going back 30 years, the photographs from negatives and digital cameras can only be done again if the original tape, negative is still around and the technology to extract it. Some of my early video tapes can be used again but it would be difficult to get a good image from them - the digital copy done 15 years ago is a better copy. I have hard drives still running from 98 but a pile of broken ones from only three years ago. These large 2-4Tb drives need checking often. RAID would help but that would mean 28 drives for each system. Even with costs coming down that the costs soon mount.