You may save a case to a group folder for your group to access. 

From the search menu:

1. Select the case(s) you wish to save:
    a. To select all the cases, click the “Select All
    b. To select individual cases, click into the small box to the left of the case thumbnail.

After selecting the cases, the Save button will appear.

2. Click “Save” in the menu bar.

3. Choose where you wish you keep the cases by selecting the name of a group folder or Creating a new group folder