Yea, st599 is correct, I was quoting 1 gig a minute for HD from my uses of DVCPRO HD (1080 30p), DVCPRO is a compression
codec applied in camera
. Doubt anyone here will be capturing uncompressed straight out of the camera, that is something for high end broadcast.
There are some lossless compression codecs like Avid DNxHD that you can download for free and use to save space, Apple has one called ProRes, I'm just not sure if they can be edited on other editing software
besides Avid or Final Cut Pro. You'll have to google
that one, I edit on Avid for pro stuff and a program called Edius 5 for fast simple little home movies.