Saw a similar post, DB causing "too high disk activity" from 5/15, people had the same concern, but no solution appeared.
I have been using DB on Win8, and with no problem, got a 2nd computer that runs Win10. Copied the DB directory directly onto 2nd machine and then synced it to the same account, so that both computers would be synced to the same online account.
I noticed that my new W10 computer was running poorly and determined that the disk was being accessed at 100% pretty much constantly. Stopping DB normalizes disk access.