You mentioned carelessness with data.

I spent fifty bucks on some old computer parts that at one point were used to hold much of the security records from large department store. Basically a tower with all the guts, including several hard drives. They said it didn't work at all, but it worked fine once I loaded a copy of windows xp onto it. From there I had access to most of the files on most of the drives. Sat and binge watched shoplifters and employees doing stupid things for several days. Years and years worth of clips. They only saved the good parts. Eventually I wiped it all though. Used the drives in RAID for fast loading times in gaming, until one crashed and ruined everything...