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Split ost

  1. Download and install the latest version of Filestar.

  2. Right click on one or more Ost file(s) on your desktop and select Convert with Filestar.

  3. Type split in the search box.

  4. Press Split.

What is .ost?

Name
Outlook Offline Data File
Extension
.ost
Format
Binary
Category
Email
Developer
Microsft
Description
n OST file is a data file created by Microsoft Outlook (2005 or later), an email client and personal information manager. It is used to store a copy of mailbox information from an Office 365, Exchange, or Outlook.com account. OST files may contain email messages, contacts, tasks, calendar data, and other account information.
MIME Type
application/x-ms-offline-storage
Sample
sample.ost

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