On my two PS3's, about 15GB between. My PC has a good 12GB, my old laptop has 5GB, my new (current) laptop has about 2GB (working on building it)... Then there are the USB sticks and external drives, which all adds up.
TOTAL: Roughly 60GB.
Then there are my online storage folders (MegaUpload/FileServe/RapidShare), which I remotely upload just about everything I can snag and download at a later date (over 100GB)... A good thing I won't share, because some file hosts are strict on what you store and share. :1orglaugh