How should i copy and rename a database?
You can’t. You have to create a new database with a new name. See:
Not that it shouldn’t be put in Dropbox ever.
As I noted here (and this can be found in many discussions on these forums):
Because at first attempt it seemed like circa 9000 ‘items’ would take hours and hours just to get into Dropbox.
We have no control over the speed of a network or responsiveness / reachability of a remote server like Dropbox’s. However, the initial push of a database will almost always take the longest since it’s usually syncing an existing database containing a large amount of data.