1. Hover over the file you would like the shared access removed from, and select Share.
   
   
   
2. Under the column Who Has Access, locate the specific user and select on the X next to their name.
   
3. Click on the Save button
   
   
4. Alternatively, if you wish to update the Share permissions, locate the specific user and update the desired shared permissions from the dropdown and click on the Save button.