Overview

OST stands for an offline storage table in abbreviation. Its capacity to save offline files in Microsoft Outlook is well known. Thanks to the OST file extension, users may keep working even in cases of server outage. The data kept offline can be updated and sent to the Exchange Server as soon as the network connection is set. Store on Exchange Server, OST files are photocopies or replicas of the database. An OST file lets one save emails, contacts, notes, journals, and tasks neatly.

Category

OST files come under the category of Database Files.

Supporting Apps

It supports all the available versions of MS Outlook.

Developer

It is Microsoft takes care of the development and upgrading of the app.

Signature

Hexadecimal: 21 42 44 4e

ASCII:!BDN

Location

The file extension saves automatically on different locations depending on the Outlook version you are using.

MS Outlook 2000 to 2003

C:\Documents and Settings\%username%\Local Settings\Application Data\Microsoft\Outlook\

MS Outlook 2007

C:\Users\%username%\AppData\Local\Microsoft\Outlook\

MS Outlook 2013

C:\Users\%username%\Documents\Outlook Files

Users can manually open OST files by following a few simple tips.

Create a new OST file and use Outlook Data Files to access OST. The method will open a new copy of files showing emails in Outlook.

Some free and paid viewers can help you to view OST files.

• OST to PST