As DTTG offers the ability to keep multiple databases open without downloading all of their contents, I think it would be useful to have an option to mark a database as a ‘storage archive’. This should exclude it from syncing and therefore should ‘freeze’ it for further modifications. Only downloading and purging (individual) content items should be allowed. This way those databases could be left open and be accessible for (re)searching, without constantly having to be scanned for syncing purposes. This would speed up the sync process.