Instead of sharing the folder or files with several individual users with the same permissions, you may want to create groups. The following describes how to create a group and how to share files and folders with that group. The advantage of this is that you can set permissions for the entire group at once. Everyone in the group will have the same permissions to access the data.
Before you can share a file or folder with a group, you need to create a custom group.
1. To create a custom group, go to "Settings" in the top right corner.
2. Next go to "Personal groups" on the left.
3. Enter the name of the group and click "Create group".
4. Once the group is created (in this example, the group name is: Students), add users to the group on the right.
Note: Not all users will appear immediately as you type. You may need to type the name in full before it appears.
5. Once this group is created, return to "Files" in the top left menu.
6. Go to the file or folder you want to share. Click the Share icon 
next to the file.
7. The following screen will appear on the right:
8. Enter the name of the group by typing the first few letters of the name. Select the group.
9. After adding the group, click 
next to the group name to grant permissions.
Set the permissions you want to give and an expiration date, if required. Click "Notify by email" to notify the entire group that the folder has been shared with them.
10. Want to stop sharing? Then click on the recycle bin icon next to the group name.