Gmail - Deleting Emails Older Than A Specific Date

Staff in Support Departments should retain emails for 7 years, or however long required by law.
Staff in all other departments, especially those that handle client data, should periodically remove emails older than 2 years.

To delete all emails prior to January 1st 2017, do the following:
1.Search your email for:     before:2017/01/01
2.Select:                               All items on the page
3.Select:                              All items that match this search
4.Select:                              The delete icon

Screenshots included below

Step 1

Steps 2 - 4