All man needs pr0n. This has been proven time and time again, through the ages, and in many a bathroom, bedroom, shower, in front of the TV....often times in public...and many other places. Man needs pr0n! That's all there is to it.
If you don't want to leave the beta, though, then you must decide what OTHER thing you can delete. It's a fairly simple trade off. If you have a lot of music, or movie files, burn some of them to CD for later useage. If you have a lot of games, then you must remove the ones that you have already beaten or have not even touched yet.
As a once ancient and wise man said:
"You can't have your cake and eat it, too."
Of course, no one is quite sure what this really means. The world may never know. Me, I say three licks.
Oh wait. Something is spilling over from the "Ask A Stupid Question..." Thread we've got going. Guess I'd better stop here then.