The PST file, also known as the Microsoft Outlook personal folder file or email archive file, is used to archive emails from a server's mailbox to local storage or network disc.

The OST file, also known as the Microsoft Outlook offline folder file, allows users to operate with Microsoft Exchange mailboxes when not connected to the internet. Emails, contacts, and calendar modifications, for example, will be saved in the offline folder. Once connected to the network, these changes in the offline folder will get automatically synchronized with Microsoft Exchange Server - emails will get sent out immediately, and changes to Contacts or Calendars will get updated to server-side objects.

If they become large, trim them down immediately to avoid email archives exceeding the 2GB limit, or file corruption will occur shortly! You can create many PST or OST files to classify your email archives. Outlook has an inbuilt tool known as ScanPST.exe to repair OST files, but this tool has the limitation of fixing the file size up to 2GB. But this tool cannot always fix corrupted PST and OST files and unable to repair severely damaged files.

So, to overcome the problem of fixing only limited file size, a professional tool like Shoviv Outlook Suite. It is one of the best-rated and multi-talented software to repair OST files and aids in the speedy completion of numerous Outlook tasks. It allows you to recover and restore both corrupt and non-corrupt OST/PST files without affecting the properties of the items.
Apart from that, you may split and merge PST files with a single click using the software. This capable tool can also compress and compress PST files if necessary. You can also process the first 50 items/folders in the software's free demo edition.

Read More: https://www.shoviv.com/outlook-suite.html