Backing Up Large Outlook PST File

Microsoft Outlook saves large PST file like contacts, messages, appointments, notes, journal, tasks, etc. in two locations that is large PST file on hard drive and mailbox on server. You can make use of saved PST file to recover huge information, if you face hard drive failure, unexpected errors, exporting information from one partition to another drive or to move data from one desktop to another.

Let us consider a real time scenario here: “Hi, I am using Outlook older version and now I am trying to upgrade it. As my PST file is very large, I wanted to backup my entire Outlook file before I upgrade my computer. Can anyone help me with this situation? I would really appreciate any worthy suggestion...Thanks!!!”

No need to panic in this situation as this article describes you the manual and third party methods to backup large PST file easily without any issues.

How to backup Large Outlook PST file?

If you don't use MS Exchange Server then Outlook stores all its information in .pst file. By following these steps you can backup entire large PST file:

Close all programs related to Outlook and click on Start, then hit on Run. Type control panel in Open box and press Enter. Here double click the Mail icon and press on Show Profiles. Click on appropriate profile and click on Properties. Now hit on Data Files, under Name hit on Personal Folder Services that you want to backup. By default, this service is called Personal Folders. It can also be named as something else. If there are no entries in Personal Folders then you have not yet saved any data in Outlook and not yet enabled Personal Folder Service.

If Personal Folder Services is not available on your profile and you want to save large file in Outlook, probably your information must be stored in Exchange Server. Click on Setting and note the path and file name that appears and close all windows Properties. Now use My Computer or Windows Explorer to copy the noted file to another location on HDD or any portable devices.

How to backup large PST file that is located on Exchange Server:

To backup huge Outlook data, you have to know where the data is located. The default storage location is Server mailbox. However, some Exchange Server administrator generally saves Outlook data in PST file on your HDD.

Follow these steps, click on File tab on Outlook ribbon. In Info category, press on Account Setting button and select Account Setting and further click on Data tab. If the Location field contains the word 'online' or a path to file name extension .ost then Outlook saves large files in folder on Exchange Server. Contact Server administrator to know about how to backup Outlook PST file. At the same time, if the location has a path to file name extension as .pst then Outlook stores messages, attachments, contacts, appointments and other attributes in PST file on hard drive. Follow How to backup large Outlook PST file section to back up your data.

If none of these procedure works or if you follow improper steps to backup large Outlook PST file, then it is recommended to use any reliable product to backup Outlook PST file with ease.

Salient features about software:

Yodot Backup Outlook PST program can perfectly take backup of large Outlook PST files on Windows OS. Microsoft Outlook emails backup can be done easily along with other attributes like attachment, calendar, notes, signatures, rules, alerts, tasks, profile setting, etc. It can backup PST file at scheduled date and time with any interruption. It has two more options like restore and migrate to transfer Outlook profile between two computers or between two versions of Outlook separately. It can backup PST file from various versions of MS Outlook such as 2003, 2007, 2010, 2013, 2016 and Office 365. The utility is compatible to backup large Outlook PST file on Windows computer running with Windows 10, Windows 8, Windows 8.1, Windows 7, Windows Vista, Windows XP, Windows Server 2008 and Windows Server 2003 operating systems. Moreover by using Yodot Outlook PST Repair tool, you can recover large Outlook data files within no time.

How to use this tool?


  • Follow proper steps while taking back up of large Outlook PST file
  • For all kinds of assistance during backup procedure, you can contact technical support unit available 24×7

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