Follow few simple steps shown as below to empty trash in google drive:-
Step 1. First, visit gmail.com and log in with login credential.
Step 2. Once you log in to your gmail account, click on the google apps icon, which is the first icon on the top right side of your Gmail page.
Step 3. Select the option “Drive” and click on that.
Step 4. It will take you to the My Drive page, now click on the “Trash” option on the left side of your screen for delete trash in google drive.
Step 5. Now you will see all Trash files loaded on the screen, click on the trash drop down and select the empty trash.
Step 6. “Empty Trash” pop up box will open, simply click on the empty trash for delete all the trash items in google drive.