You can't add extra memory to the Apple TV. Once out of space, you can stream to it from your main computer.
I have about 300 or so CDs in Apple Lossless stored on it. It's about 3/8 full. If I ever run out of space, what I'd do is keep my everyday CDs on it, and stream the odd stuff.
I have all my music stored on an external 1TB hard drive in addition to the Apple TV.
There are hacks out there that allow an external hard drive to be connected directly to the Apple TV, and there are a few companies that'll put bigger hard drives in them. Not sure how much I trust altering gear personally.
I have about 300 or so CDs in Apple Lossless stored on it. It's about 3/8 full. If I ever run out of space, what I'd do is keep my everyday CDs on it, and stream the odd stuff.
I have all my music stored on an external 1TB hard drive in addition to the Apple TV.
There are hacks out there that allow an external hard drive to be connected directly to the Apple TV, and there are a few companies that'll put bigger hard drives in them. Not sure how much I trust altering gear personally.