Microsoft Outlook is a popular email program that computer users love. This email program is used to send and receive emails. It also includes a task manager, contact manager, and calendar. A journal is available as well. It was designed by Microsoft and is compatible with all major versions of MS Office Suite.

MS Outlook stores all messages and other mail items in a file called PST (Personal Storage Table). This file is also called a Personal Folder File, or a Personal Address Book. This file format has a problem with its size limit. There are generally two types of PST files available: Unicode and ANSI. MS Outlook 2000, MS Outlook 98, and MS Outlook 97 support the ANSI file format.

It can only store 2GB of data. It can only store 2GB of data. It cannot store more than 2 GB of data. If it exceeds this limit, it could become corrupted. Unicode is another file format that MS Outlook 2003, 2007 & 2010 supports. Outlook 2003 and 2007 allow it to be up to 20 GB, while Outlook 2010 allows for 50 GB. A Unicode PST file generally does not exceed its limit. However, it can sometimes surpass it. This can cause Unicode PST file corruption. MS Outlook can hang when you open large files, or it may cause Outlook to become slow. These can cause serious problems for MS Outlook users. These situations can be overcome by reducing Outlook's data file size.

There are two ways to reduce a large PST file. You can either do it manually or by using a third-party application.

How can I manually reduce the Outlook data file size?

You can manually reduce the Outlook data file's size by running the Compact command. It may take several minutes for the file to be compacted. Before you can start to compress your file, you need to delete any unwanted data. These are the steps to manually compact a PST folder.

  1. You must first delete any unwelcome items from your PST files.
  2. Now, open the Folder List view. The Folder List icon will be at the bottom of the Navigation Pane. Click on it, or press Ctrl+6.
  3. Right-click on the Deleted Items folder within the navigation pane. Next, click on Empty Folder.
  4. Click on the File tab.
  5. Click on Accounts Settings.
  6. Click on the Data Files tab to select the PST file you wish to compress.
  7. Click on Settings and click on Compact Now.

A manual solution can also be used to compress an Outlook file.

  1. Click on File > click Data File Management.
  2. Select your Personal Folder (PST), and then click on Settings.
  3. Click on Compact Now from the General tab.
  4. Click OK > and then click Close.

A third-party PST Compressor Compact application is a simple, effective, and better way to shrink large Outlook data files. This tool effectively reduces large Outlook data files and does not cause any damage. Third-party PST compression software is very safe and simple to use. These tools are cleverly designed to reduce extra space in PST files. You can search Google for PST Compress software. However, it is important to verify any third-party software before you purchase. Third-party software is generally available as a free trial or demo version. Demo versions allow you to test any software. The Demo version allows you to preview the output of the software. This output can be viewed in the demo version's preview session. If you are satisfied with the output, you can purchase the full version. You can also try another version if you are not satisfied. There would be many options.

The PST Compress and Compact software of Sys Info Tools is the best way to reduce or shrink the oversized PST files of MS Outlook. outlook information store could not be opened This software compresses multiple PST files, including attachments. This software allows you to safely delete any extra or unused space from your PST files. This software also creates a log file that records the PST compression process at the user's location. This software can also successfully compress password-protected PST files. This software supports all versions of MS Outlook, including Unicode and ANSI PST files.