I have a new computer, and backed up my Library to an external drive.
I then copied that library back to the new system in the folder in which dropbox would be installed.
I noticed when I opened Calibre that somehow over 100 books did not show up...after looking at the files, they just weren't copied over!
BUT, in my Dropbox account, the books are there...my question is will my dropbox sync with my PC and download the books to my PC that are not there? And then should I just delete the old Library and create a new one, and add the folders again? I've got about 1000 in my library and trying to get the easiest route possible.