That must be some hard drive.
You reminded me of something. I recall about a year ago I ran into a guy that archives quite a bit on the internet. He actually did the awesome Spoony archive that is over 700 vids:
Spoony Archive
So I questioned him about potentially archiving DSP's work. He wasn't up to it, said it would take months and months and terabytes upon terabytes even with help. He has been doing it for years and DSP by himself may have more videos than what he has archived already. Not impossible but a lot of work.
If he does have everything on an external, its massive.