Space 1999 and UFO is currently on TV over here on ITV4 in the UK, but I'm sure you can get them on Video via ebay.
I buy 640GB drives that give me 500gb formatted and they seem to fill up. The problem is getting your mind organised instead of just dumping and getting duplicates.
I consolidated my music archive and found I have 3 dupes to each track. I have more space now.

I have an Airlink 350 NAS drive that has a 400gb drive and two Buffalo Drive stations in read only NTFS format for music and films. I'm cringing on the day I have to move them to another drive for backup.
Maybe then we will see those 100 TB bacteria hard drives I keep hearing about on Wired.

I just backed up my DVD archive as I was getting rot on some of the verbatim stock. Took me two weeks of DV archive disc swapping to fill a 500GB drive. I hate to think of the cost of the duff DVDs.
I lol'ed at the MFM drives. I had two MFM full heights and a RLL full height drive in my old XT. It took me weeks to daisy chain the two MFMs on one card.
Now I'm looking at a 4gb micro SD no bigger than my pinky nail.......