I do not invest in any CD's or DVD's. If I run out of storage space I just go and buy another harddisk. I have three 250GB HD's in my PC. One is for the programmes, games and personal stuff, the other two are there for the collection of pictures and movies. Soon I will exchange them one after another with 500GB ones.
Sure, if I have a harddisk crash or some sort of HD-failure, a lot of data goes belly up at the same time, but hey, it's only porn I got for free in the internet... so I would just start all over again to collect the stuff. Which is a big part of the fun anyway.
Greetings, lip