To back up and archive your Outlook PST files, follow these steps:

Backup PST Files:

1. Locate the PST File:
   • Open Outlook.
   • Go to File > Account Settings > Account Settings.
   • Click on the Data Files tab.
   • Note the location of your PST file.
2. Copy the PST File:
   • Close Outlook.
   • Navigate to the location of your PST file using File Explorer.
   • Copy the PST file to your desired backup location (e.g., external drive, cloud storage).

Archive Emails:

1. Manual Archiving:
   • Open Outlook.
   • Go to File > Info > Tools > Clean Up Old Items.
   • Select "Archive this folder and all subfolders".
   • Choose the folder you want to archive.
   • Set the date to archive items older than a specific date.
   • Choose the location to save the archive file (.pst).
   • Click OK.
2. Auto Archive Settings:
   • Open Outlook.
   • Go to File > Options > Advanced.
   • Under AutoArchive, click on "AutoArchive Settings".
   • Configure the settings as per your preference (e.g., how often to run AutoArchive, where to save the archive file, etc.).