Followup report.
On Sunday evening, I paused dashcam with a long press, flipped the Verbatim device into WiFi mode and confirmed that it had attached to my local network, and launched a robocopy command line to move all the files. It took a few hours to move about 30GB from the device, over the wifi, to a local drive. IIRC, it completed in the first pass; it was on car power for a while, then on self-contained power, then eventually, sometime after the copy completed, the self-contained power ran out.
I was also able to reach the music partition and add some content while it was wifi attached.
Monday morning, I flipped the switch back to USB mode and resumed dashcam with a long press.
The robocopy job remained running and just circled on errors that it was unable to reach the source.
On Tuesday evening, I paused dashcam with a long press and flipped the Verbatim device into WiFi mode. After about a minute, it reattached to the network; after a couple more minutes the robocopy job tried again, found the device, and again moved all the files -- in this case, it was about 11GB (3.6 in RecentFiles; 7.4 in ten Sentry captures).
Wednesday morning, I flipped the switch back to USB mode and resumed dashcam with a long press.
Net: Highly successful.
Possible enhancements:
- don't bother capturing RecentClips.
- move older files, but only copy the most recent files, so that the most recent remain on the stick for a while.
- automatically sync music files to the other partition when attached.
RecentClips overwrites after an hour, for a steady-state ~4GB, but SavedClips grows every time the user, or Sentry, saves a set of clips; about 857 to 950 MB per save. In my particular usage pattern over the last couple of days, that's 4 to 6 captures per day, or about 21 days to fill 128GB.
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