Sony DVDirect VRD-MC3 Operating Instructions Manual page 21

DVD camcorder
The entire video content of the camera's 8-cm disc is recorded onto a 12-cm
disc.
DV camcorder
The entire content of the videotape is recorded onto a single disc.
The DVDirect controls the camera during the entire process, and completes
creation of the video DVD. The completed DVD is automatically finalized,
allowing immediate playback on DVD players.
Incremental Recording (page 35)
This mode allows you to record the content of an HDD camcorder connected
via a USB cable onto a disc. Using this mode, you can record only the newly
taken contents of a camera whose previous contents have already been
recorded onto a disc.
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