Just as last time I rebooted, when I woke up this morning the folders are all back - about 12 hours later. Subfolder windows are slow to populate but eventually do and the drive is once again available to the network. I suspect, as before, the drive will remain available until the next reboot, then I’ll have to wait another half a day for the drive to show up. Drive is still spinning though.
Mostly used for backups, I’ll take advantage of the fact that is up and copy off those folders that are not backups of other drives.
I’m not saying I don’t need to run chkdsk but is it possible the USB components of the Elements is failing? Also, This issue could seem to coincide with the latest AVG program update. Hard to tell as this machine rarely reboots.