Some food for though is look at your personal libary size and how much has it grown over the past few years. For example my music libary has been at around 30 gigs now for the past 4 years or so. Yes I have added music over the past 4 years but still close that number.
Now on tv shows on the other had I have fill up a 500gig hard drive and have to go back a delete shows but I was mostly torrent files because I eithr did not have cable and or a dvr. That or it was how I watch past seasons of stuff most of it only gets viewed once so not a big deal.
Either way the best advice I can give is look at you personal media habits over the past few years. If you media libary has not grown much over the past few years chance are it is not going to much in the next few years as well.
Now on tv shows on the other had I have fill up a 500gig hard drive and have to go back a delete shows but I was mostly torrent files because I eithr did not have cable and or a dvr. That or it was how I watch past seasons of stuff most of it only gets viewed once so not a big deal.
Either way the best advice I can give is look at you personal media habits over the past few years. If you media libary has not grown much over the past few years chance are it is not going to much in the next few years as well.