I am capturing home movies from a Sony MiniDV camcorder through my ATI all in wonder card and first, is 300MB per minute of high quality video right?

Second, it looks good on my screen as it is capturing it, but when I play it back, it kind of studders a little. Is that a frame rate issue?

I am using MGI VideoWave for the capturing, should I use something different?

How am going to fit 90 minutes of video at 300MB per minute? 27000MB or 27GB......I guess that might be true.

let me know if you think I am doing everything right.