While I would never use USB due to video quality issue, I've seen in the tens of GB on some captures. Is this a problem?
Once you capture what you want then one usually edits it and maybe transcodes it to something they like or they stick it on DVD.
While I'll note VLCPLAYER will play and transcode with ease I'll not offer how to use it.
I'm using a Sony Handycam DCR-HC26 to take video on a regular basis so I would want the file size when uploading to be relatively small. Today I took a 16 minute video and uploaded it using a USB connector and the bundled camera software (PicturePackage). The upload created two AVI files totaling about 5GB! After seeing this, I'm not going to upload many videos unless I know how to change the output from my camera and / or convert the videos to lower quality format (smaller in size).
Here is a screenshot of the folder with the video (split into two parts):