Thanks for responding Aaron. The 4GB size limit isn’t imposed by my computer’s hard drive, it’s actually a limitation of the camera’s recording method.
The camera records onto Sony proprietary SxS flash-based cards which have the limit. So if you shoot something thats, say 20 minutes long and the size of that file would be (for argument’s sake) 6GB, there won’t be 1 6GB MP4 on the SxS card you recorded to, there will be one roughly 4GB MP4 file, and one roughly 2GB MP4 file.
It creates metadata files that tell it that these clips go together, so when you watch the clip on the camera or with Sony’s Clip Browser software it appears as one continuous clip.
When I use my Media Browser in Adobe Premiere to view clips in XDCAM EX format it will see these as just one single clip and will show me the correct duration, but when I drag it over into my bin, only the first 13:40:00 or so makes it (which I believe is just the first MP4 in the series.)