How to Backup Outlook Emails to PST File

Why a PST File Is the Best Way to Backup Outlook

PST (Personal Storage Table) is a file that stores emails, attachments, contacts, calendar, tasks, and notes in a single archive that can be opened in classic Outlook on any Windows computer.

Backup Outlook emails to PST file is a good idea because it allows you:

• to protect your mailbox from hardware issues and accidental deletion
• to migrate your mailbox to a new computer
• to save copies of your old emails before leaving a company, closing an account, or switching providers
• to save space on a server with size limitations

Regular Outlook email backup to PST is one of the easiest and most effective ways to ensure data security.

Method 1 · Import/Export wizard

How to Export Outlook Emails to PST File

There are two methods to backup Outlook to PST file: using Import/Export wizard and copying an existing PST file. The first method is universal and suitable for all Microsoft 365, Exchange, IMAP, and POP accounts.

1. Launch classic Outlook application and go to File > Open & Export > Import/Export
2. Select Export to a file and click Next
3. Choose Outlook Data File (.pst) and click Next
4. Under Export, choose the account name or folder containing the data you want to save and tick Include subfolders
5. Click Filter to narrow the search by date or sender
6. Tick a destination to save the PST file and set the action for duplicate items
7. Finally, click Finish and optionally set a password for the file

Depending on the size of the mailbox, the export process can take several minutes or up to an hour. Make sure to keep the Outlook application open until the process is complete. Using the Import/Export wizard is the most reliable way to export Outlook emails to PST.

Method 2 · Copy the file

Copy Existing PST File for POP Accounts

If you have a POP account or use local PST archives, your emails are already stored as a file on your computer. In this case, you can simply copy the PST file to a flash drive or external storage to make a backup.

1. Launch Outlook, go to File > Account Settings > Account Settings, and select the Data Files tab
2. Select the file you want and click Open File Location
3. Close Outlook and copy the PST file to another device

Where to Save PST File Backup of Outlook Emails

An Outlook PST backup is only as secure as the place where it is stored. To ensure that at least one copy of the file is available when you need it, follow the 3-2-1 rule: keep three copies of the data on two different mediums (hard drive and cloud) and store one copy offsite.

Since Microsoft does not provide a built-in scheduler for PST export, you will have to set a reminder for yourself to perform regular Outlook email backups to PST.

How to Reinstall PST File with Outlook Data Backup

To reinstall the PST file:

• Go to File > Open & Export > Import/Export.
• Select Import from another program or file.
• Choose Outlook Data File (.pst).
• Select the file you want to import.

Alternatively, you can open the Outlook Data File directly.

What if the Backup PST File Cannot be Opened?

Sometimes, even a well-prepared PST file backup may stop working because of a hard drive issue, improper export procedure, or file corruption. Outlook will notify you if the file is not a valid data file or if it cannot be accessed.

Amrev Outlook Email Recovery can scan the PST file with Normal or Intensive Scan to locate recoverable emails, attachments, contacts, and calendars and save them to a new PST file. The software uses a read-only scanning engine to ensure the integrity of the original file. If you have set a password for the exported PST file and forgotten it, read how to recover a forgotten Outlook PST password. Amrev Outlook Recovery can scan the file for recoverable password values. If the original file is severely damaged, the software can extract the data to a new PST file.

Tips for Outlook PST Backup

• Set up regular Outlook email backups to PST file after completing big projects or before performing system maintenance.
• Remember to use descriptive names for your .pst files (for example: Outlook-Backup-2026-10.pst)
• Test-open the files to ensure they are not corrupted.
• Since the newer version of Outlook does not support PST files, use classic Outlook for email backup purposes.
• In case of an emergency, download the free trial version of Amrev Outlook Recovery to scan the PST file and see what data can be recovered.

Protect Your Mailbox Today

With a little preparation, you can safeguard your Outlook emails from accidental deletion, system malfunctions, and hard drive failures. Following the above tips will help you create multiple copies of your PST files, store them in different mediums, and test them occasionally. If a backup file fails you at a critical moment, you can download the free trial of Amrev Outlook Email Recovery and scan your PST file for recoverable data.