How to Upgrade PST File

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How to Increase PST Size Limit to Prevent Corruption?

Are you using an older Outlook version (2000/2002)? Is your PST file approaching the maximum file size limit of 2 GB of ANSI PST? Beyond this limit, Outlook can get corrupted as the application does not support PST files crossing this 2 GB limit.

Prevent Corruption

To prevent corruption, you must find ways to increase PST size limit. One viable solution is PST file conversion from Outlook ANSI to Unicode. When you upgrade Outlook PST file, it will automatically increase Outlook mailbox size as Unicode PST of newer Outlook versions (2033/2007) have 20 GB file size limitation.

How to Increase PST Size Limit?

Possible methods to upgrade PST file, which will automatically increase PST size limit from 2 GB to 20 GB, are as follows:

  • First Method – Use Outlook In-built Feature (Not that Easy): You can use Outlook’s in-built feature to upgrade PST. However, this method is never recommended as it is extremely difficult, even for computer experts. This leaves you with the other option to increase Outlook mailbox size by performing the process to upgrade Outlook PST file from Outlook ANSI to Unicode, which will automatically increase PST size limit.
  • Second Method – Third Party Software (Recommended): One of the appropriate tools for PST file conversion is SysTools PST Upgrade software. It can be used to upgrade PST file from ANSI to Unicode. After PST file conversion from Outlook ANSI to Unicode, your PST file size limit will automatically increase from 2 GB to 20 GB of Unicode PST. The software supports most Outlook versions, so you can convert PST file to 2003 format also using this tool.