Dropbox is stuck syncing after an update, what can I do?

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Shawn B.14 wrote:

 

I'm torn between two theories, one of which touches on yours:

1) it isnt this thats an edge case at best

2) the issue is not the DB server back end sync

3) Dropbox choose to replace the meta detail data base on the files

C:\Users\[username]\AppData\Local\Dropbox\instance1 used to contain some big files containing all the meta data, now a folder C:\Users\[username]\AppData\Local\Dropbox\instance1\sync has appeared that contains it. 

They chose to not migrate the database but to build it from scratch, I know this as my near 10GB signature file has vanished and a new one is being built with a new name.

However (A) that means it stuck doing a full resync on the 500K+ of files I have and (B) the the full resync on thayt sizze file set CRASHES THE DROPBOX APP.  (C) even if it did not crash my resync time is counted in days to weeks and the result of that is unsynced machines and machines that end up with plenty of conflicts on each and every file changed elsewhere and not yet reindexed locally, as the result will be a conflicted copy.