How to Backup Outlook OST File: Easy Methods to Try [2025]

In the late 1990s, OST files greatly benefited Outlook users. By storing a copy of Exchange mailbox data offline, they made it easier to access Exchange mailbox data, helping to reduce the gap between server mailboxes and desktop application mailboxes. However, OST files are non-portable and easily corrupted due to errors or other issues. Thus, it is essential to backup OST file manually or with a Cigati OST to PST Converter. This will increase productivity and safeguard OST files.

Why Make a Backup of Offline OST File?

Backing OST files is necessary for the flexibility and scalability of data control. It is useful in server downtimes without the requirement of an MS Exchange Server. In addition, with OST backup, easily access data globally at any time and even maintain historical records for a long. Moreover, when switching to a new computer, backup files provide quick data access without extra losses. Lastly, it will be useful for data recovery in case of unforeseen situations.

Which Methods Backup OST Files in Outlook?

Though your OST files get synced along with Exchange Online, backup is crucial to avoid data loss due to potential threats. Two major ways will help you to archive OST data without much hassle: manual solutions and a professional tool. Follow these methods with complete procedures as given below.

Which Tool is a Perfect Solution for OST File Backup?

Cigati OST to PST Converter is the most recommended solution to back up OST in another format or to email clients. It effectively performs bulk OST backup without losing data integrity or original file structure. Additionally, this tool offers several filter options to improvise the resultant file. Moreover, the user-friendly interface makes tasks smooth and the Windows system compatibility is a bonus.

Steps to Backup Offline OST File

1. Run the OST to PST Importer and select a type of file option. Click Next.
2. Upload the OST files/folders to backup from the system and press Next.
3. Further, preview and select folders from the tree hierarchy. Hit Next.
4. Mark File Formats and from its menu, select PST to backup OST data.
5. Afterward, opt for the necessary filters and provide a Path to Save new PST.
6. At last, click on Convert to initiate the OST to PST conversion.

Which Manual Methods Backup OST File?

There are two ways, i.e., Import/Export and Archive to backup OST data manually. Follow these steps:

Method 1: Backup Outlook OST File With Import/Export

1. Before proceeding, ensure your Exchange OST files are present in Outlook.
2. After that, in Microsoft Outlook, navigate to the taskbar and select File.
3. Then, press Open & Export and tap the icon of Import/Export.
4. In the Import/Export wizard, you will find the Export to a file option. Select it and click Next.
5. On the next screen, choose the option Outlook Data File (.pst). Tap Next.
6. Afterward, you must browse and select the OST folder that needs to be saved. Hit Next.
7. Click the Browse button and select the folder location for the new OST file (now PST).
8. Lastly, click the Finish button to end the backup process and secure OST.

Method 2: Backup Offline OST File With Archive Option

1. Stay in the MS Outlook account and move to the Info tab under File.
2. Next, from the options of the Cleanup Tools, select the Archive feature.
3. Now, pick the OST files or folders to archive for backup.
4. Check other options (if needed). Otherwise, click Browse and enter your destination.
5. Finally, press the OK button and your OST files will be archived. These can be used later whenever required.

Are There Any Drawbacks of the Manual Solutions?

Yes! Though the methods are quite easy and direct, they aren’t an absolute solution and have some cons:

• Human error can cause data loss or alterations.
• The system used for OST file creation and backup must be the same.
• Not suitable for corrupted or damaged OST files.
• Deleted components cannot be retrieved back once gone.
• Unsuitable for large and bulky files as errors may be encountered.

Conclusion

To sum up, we know that OST backup has been very important for all MS Exchange users since the revolution. The best possible way to do this is by converting OST to PST. This blog provided three different techniques to back up OST files. The manual method uses Outlook built-in features for OST backup but has some limitations. On the other hand, a professional tool seamlessly backs up OST files without hassle and complete data security.

You May Also Read: How to Backup Outlook Emails from Browser

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