Actually, I have 600GB of storage space (3 200GB Maxtor Drives), and I want to pick up at LEAST 2 more 300GB drives.
I have about 40GB free... and that's because I haven't re-installed my games yet...

I have a feeling I can fill up my 1.5 TB goal... lol
But not ALL of it is downloaded. I do alot of audio/video editing, and when you work with the BEST quality out there (uncompressed) and covert to DivX or XVid, or OGG or MP3, you need TONS of space. Converting a 400MB 2 hour video file to MPEG for DVD playback requires about 3.5GB for the video and about 500 MB for the Uncompressed audio.
And that's just ONE video. Plus, anything recorded by FRAPS is in Uncompressed RAW, so I get EXACTLY what I see on my screen... about 5 minutes of that at 1024x768 gets me a split 6GB AVI file