Can we have more folder options like custom folders or sub-folders to add to Computer Backup?

This is so typical of Dropbox. It would be simple (for companies that have competent management and programmers) to allow a user to specify an arbitrary folder for back up, e.g. F:\Docs\Courses. But Dropbox sets arbitrary, ridiculous restrictions on what you can do, and does not even attempt to change it. If I did not already have so much data in my dropbox account, I would drop it immediately and use a cloud storage service that is reasonable and competent. In addition I have found their customer service to be anything but that. Usually if something goes wrong with their code they blame it on Microsoft. At some point I am going to have to find another service because Dropbox has proven to be so bad in so many ways.