1. Open Apple Mail on your Mac.
2. Create a Local Archive Folder:
   1. From the top menu, click Mailbox > New Mailbox.
   2. In the pop-up:
      1. Set Location to "On My Mac".
      2. Name it something like "Email Archive".
      3. Click OK.
3. Move Emails to the Archive:
   1. In your Inbox or any folder in your account, select the emails you want to archive.
   2. Drag and drop them into the new "On My Mac" folder.
   3. This moves the emails off the server and into your Mac's local storage.
4. Check That They’ve Moved:
   1. Open the folder under "On My Mac" to confirm the emails are there.
   2. Once confirmed, you don’t need to delete them from the Inbox — they’re already off the server.
5. Optional: Back It Up:
   1. For extra peace of mind, go to File > Export Mailbox… and save a backup of the archive to an external drive or backup folder.