My 500GB external is full. 3/4 of it is Time Machine backup and the other is movies and T.V. shows synced with Apple TV. My internal is getting full as I only have about 29 GB at any given time. However, if I am ripping a dvd for Apple TV conversion or other tasks it can get much lower. I plan on buying a Time Capsule for Time Machine and then use my existing external for movies. 500GB each. My question is should I upgrade my internal hard drive? I have 120 GB and think even a 250 GB would be great. Who has upgraded? Give me some advice please!