I have my DEVONthink packet sync folder in the Dropbox “Apps” folder set not to sync to the Finder, via its “selective sync”, to free up space. So the sync store gets synced to and from Dropbox without the files having to appear in my Finder. Standard practice as I assume.
But - will DT3 sync my data to and from Dropbox if the macOS Dropbox app is set to “Pause Syncing”?
Yes. Our sync engine doesn’t use the Dropbox application at all. In fact, there’s no need to even have it installed on a Mac to use Dropbox with our sync.
What do you mean by “effective”? The number of sync stores should not influence the effectiveness of the sync one bit. Efficiency might be another issue, but why is that a possible issue, given that sync happens in the background?