NOTE
If you cannot do the following, your administrator has probably deactivated this feature.
PROCEDURE
Step 0: If you have not yet uploaded the files you want to share, drag and drop them into the folder you want to share.
Step 1: Click on "share".
Step 2: Select the users you want to share with. You can speed up your search by starting to type in the name of the user.
Step 3: Select the permissions you want to grant the user.
Step 4: Press save.
NOTE: You can share with multiple users and assign permissions before pressing "save".