My Drive:

• Select the My Drive option from the left-hand menu.
• Select a file or folder.
• Click on the Last edit was... hyperlink at the top of your page. 
  
  

Shared Drive:

• Select the Shared drives option from the left-hand menu.
• Select a Shared drive.
• Select a file or folder.

In the upper right corner of the screen select the i to view the drive's details, then select Activity to view the folder or file details. Here you'll be able to view:

• When files are uploaded, added, renamed, moved, edited, or deleted from the drive.
• Deleted files that have been in trash less than 30 days can be restored from this screen.
• Who shared a file or folder, and who they shared the file or folder with.
• When permissions are changed for a folder or file and the updated permissions.