My number 1 computing problem is data retention -- I am happy with the status quo, except when my hard disks crash and I loose my data. I love my data and want to be able to
trust my computer never to loose any of it.
I should be able to trust a hard disk to last five years, but in reality you're lucky if you get two years from most high speed disks you buy today.
PS - I am well aware of the options available to me, including RAID, external USB drives, NAS et al... But all of the for-mentioned options are far too expensive or inconvenient for me to use... So I sit on a pin edge waiting for my computer
to roll over and play dead, while I cry into my lap...
I'm with Manip, there's nothing worse than losing data.