If you are as unlucky to have an HDD failure you will loose all your shows
Your collection is larger than mine, but I have cards I probably haven't seen in years.
For me personally, if I was to lose them, I'd watch what was left .. c'est la vie.
However, with the low cost of disks, I have multiple backup copies on disks I rarely use
if it is important to keep any, buy a backup disk and ... backup.