This week, when I boot my PC, the sync manager indicates over 300,000 files are being synced. When the process ends an hour or two later, there is no record of which files have been synced.
This behavior does not occur on my mac, only on the PC and only within the past week or two.
Support first claimed it was due to a new desktop version of Dropbox.
Then support claimed if you have over 300,000 this is expected behavior.
Neither of those sound plausible.