You can create multiple digi.me libraries on any one of the three Cloud Storage services (Google Drive, Dropbox and OneDrive), and can access them whenever you want providing you can remember the password.
When opening the digi.me app, you will be presented with an option to connect to a library previously created. Select this option and choose from one of the three Cloud Storage services shown on the screen. By entering your credentials, you will be presented with a list of libraries already created. Simply select one of them and enter the password to open your library.