[PeterM]

Im sure it has happend to us all at sometime (even the conspiracy theorists).
Accidentally recording over a family gem of a VHS, are your childs first footsteps any less important than the first steps on the Moon? Deleting something from the PC without thinking, Hard Drive crashing with no backup. Perhaps even scarier is the amount of precious family pics/videos now being stored on DVD, Memory Sticks and External Hardrives, often without the old faithful hard copy.
I read not long ago (after someone finally did some research dispelling the myth that DVDs and CDs "last forever") that the average life span of a DVD was 18 months to 5 years, there are now gold archival DVDs offering up to 100 years.
Some here may have a surprise in years to come when they go to show the grandkids the pics and videos taken years earlier.
PeterM.