Browsing through a copy of The Guardian the other day, I saw a mention of their computer editor's "Laws of Computing":
"As Schofield's Second Law of Computing asserts, data doesn't really exist unless you have two copies of it. Preferably more. And the only person who can be held responsible for that is you."
Wading through hard drives, deliberating, deleting, backing up.
Does it ever end? Probably not.