I have a NEW MAC and uploaded the Dropbox app to the desktop using a business email instead of my personal one which I have always used, has expanded memory and ALL my files. Now every time I open Desktop the empty account comes up and I have to log into my original account. I am beyond frustrated with this as I need my files backed-up daily and do not want files to inadvertently start getting saved to the new account. I have read other responses that say you cannot link 2 personal accounts, one must be a business account. The only way I can see my Dropbox experience files working seamlessly is by making one of these accounts a business account. Am I correct? Is this possible? What's it going to cost me. I already paid $100 for DropboxPlus. HELP