How to Backup OST Files Like a Pro? – A Complete Guide

Bhawna Barwal | backup file conversion How to's OST Software Technology | 4 minutes read | Modified on: 14-07-2026
how to backup ost files

Introduction

If you are a user of Microsoft Outlook for work or personal communication, your mailbox data is one of your most valuable digital assets. Emails, contacts, calendars, tasks, and attachments often contain important information that you can’t afford to lose for sure.

While Outlook stores mailbox data in different file formats, users with Exchange Server, Microsoft 365, or IMAP accounts commonly work with OST (Offline Storage Table) files. Although OST file allows you to access your mailbox offline, it is not designed to be used as a standalone backup file. If your Outlook profile becomes corrupted, your Exchange account is deleted, or your computer crashes, accessing your OST data can become difficult. That’s why many users look for reliable ways to back up their OST files. One of the easiest and most effective solutions will be mentioned here in this blog. In this guide, we’ll explain how to backup OST files in detail so read this blog till the end.

Why Should You Backup OST Files?

Many Outlook users assume their mailbox is always safe because it’s synchronized with a server. However, there are several situations where creating a backup becomes essential.

Prevent Data Loss: Unexpected events like hard drive failures, accidental deletion, malware attacks, or Outlook corruption can make your mailbox inaccessible.

Prepare for Migration: If you’re moving to a new computer or Outlook profile, backing up your OST file ensures your important emails remain available.

Archive Important Emails: Businesses often archive old emails for compliance, legal, or organizational purposes.

Access Emails Without Outlook: Converting OST files into PDF or EML allows you to view important emails even if Outlook isn’t installed.

Go with the Professional OST Backup Tool to Backup OST Files Like a Pro

CubexSoft OST Converter –It is a specialized OST backup software solution that converts Outlook OST files into various file formats while preserving mailbox data and folder structure. Instead of relying completely on Outlook or Exchange Server, users can create portable backup files that are easier to store, transfer, and restore. The software can convert OST to PST, PDF, EML, MSG, MBOX, HTML, TXT, Office 365, Gmail, IMAP, etc.  These formats provide greater flexibility for backup, migration, and long-term storage.

How to Backup OST Files Using OST Backup Tool?

Backing up your Outlook mailbox with OST Backup Tool is a straightforward process:

Step 1: Install the software

Download and install OST Backup Tool on your system.

Step 2: Add the OST File

Launch the application and then Select Files and Folder.

Step 3: Preview Mailbox Data

Once the OST file is loaded, the software scans the mailbox and displays a preview.

Step 4: Choose the Backup Format

Select your preferred output format based on your backup requirements. For example: PST, PDF, EML, MBOX, MSG, etc.

Step 5: Select the Destination Folder

Choose the location where you want the backup files to be saved.

Step 6: Start the Conversion

Click the Convert button.

Key Features of OST Backup Tool

Bulk Conversion Option: Backup multiple OST files in a single operation, that saves time for organizations and IT administrators.

Preserves Complete Data Integrity: This reliable software maintains email formatting, attachments, hyperlinks, metadata, folder structure

Selective Backup: The tool lets you export specific folders or date ranges instead of the entire mailbox.

Multiple Export Options: It is a professional software that supports several output formats to meet different backup and migration requirements.

User-Friendly Interface: Even users with limited technical knowledge can complete the backup process with just a few clicks.

Advantages of Using the OST Files Backup Tool

Faster Backup Process: Large mailboxes containing thousands of emails can be backed up quickly without complicated procedures.

Easy Email Migration: Converted files can be imported into Outlook, Thunderbird, Apple Mail, and many other email platforms.

Better Accessibility: Exported emails remain accessible even if the original Outlook profile is unavailable.

Improved Data Security: Creating regular backups helps reduce the risk of permanent data loss caused by hardware failures or account issues.

Flexible Storage: Backup files can be stored on external drives, cloud storage, or secure company servers.

Tips for Backing Up OST Files

  • Create regular backups of important mailboxes.
  • Store backup files in multiple locations.
  • Verify the exported data after conversion.
  • Keep enough storage space available before starting the backup.
  • These simple precautions can help protect your Outlook data over the long term.

Read more

How to Transfer OST to Google Workspace

How do I Open an OST File Without Exchange

Let’s Sum Up

Backing up Outlook data is an important step in protecting valuable emails, contacts, calendars, and other mailbox information. OST Backup Tool helps in the backup process by converting OST files into formats such as PST, PDF, EML, MSG, and MBOX while preserving the integrity of your mailbox. By making regular backups part of your routine, you can ensure that your Outlook data remains protected, portable, and easily accessible whenever you need it. Use free demo edition of the software to learn how to backup OST files for free. The software runs on both Windows (Windows 11, 10, 8, 8.1, 7, and earlier versions) and Mac Operating Systems such as Monterey, Catalina, High Sierra, Mojave, etc.