After you sign up for Microsoft 365 Business, you’ll want to copy your existing work files to OneDrive for Business. OneDrive is a good place to store personal work files or sensitive business files that you want to control access to.  For more tips like this, check out the working remotely playlist at www.youtube.com/FoetronAcademy . Also, if you need any further assistance then you can raise a support ticket and get it addressed.