This problem has been posted several times as early as 2015, but there seems to have been no remedy. We have fairly powerful computers (Dell XPS 8900 i7-6700 3.4 GHz 16GB RAM 2TB HDD), but after moving from our old computers to new ones, we still get massive slow down when dropbox is syncing. We literally upgraded our computers to fix this issue, to no avail. Note that we have had a business account for over 3 years now.
I understand dropbox needs, this and that for searches and xyz, but this is not an excuse to slow down the performance of our computers. We sometimes, literally can't work, because of this problem.
I hope Dropbox can FIX this problem instead of providing a response to me.