Step 1. Go to libraries
Click the menu icon on the top left of your screen and click Libraries in the main menu.
Step 2. Manage a library
Click the gear icon on a library tile to manage the library.
Step 3. Click create
Click the Create button and choose Group.
Step 4. Select a parent
To make this a sub-group, select another group as its parent OR select the 'Create top-level group' option and click Next.
Step 5. Enter details
Enter a name for the group, leave the status enabled, and click Create. This name shows up in the side menu when you open the library. Now you can start adding content to this group.