There are two ways to connect a personal and work Dropbox accounts. You can either connect both the accounts through mobile device or on any computer. If you want to connect using mobile device, then you can start out by going to https://dropbox.com/pairing from your mobile web browser. You can also do this by clicking the link in your email invitation. You will get a chance to set up both your personal and work Dropbox accounts. If you already have files in your Dropbox account, then you can choose which Dropbox you want to move all your files into. You will be able to move your files later on. Once you have done set up, you are ready to start using both your personal and work Dropbox on all your devices and files will be separate.