03 Best Methods to Reduce Size of OST File in Outlook

Summary: If you want to manage your oversize OST file effortlessly, you are at the right place. In this write-up, we will discuss the best possible ways to reduce OST file size by using Aryson OST Splitter Tool. Download Now   Download Now

An OST file is a data storage file created by Microsoft Outlook. It is used to store a copy of mailbox items from an Office 365, Exchange, or Outlook.com account. These OST files are stored on the local computer and contain email messages, contacts, tasks, calendar data, and other account information. Also, users can create appointments, search or add a contact, and read and write emails when offline.

However, users can make any changes in the OST files when connected to a reliable internet connection. These offline files are increasing and occupy storage space that is causing errors, bugs, and hanging in the Outlook email client. In that case, reducing the size of the OST file helps the users to manage their Outlook account effectively.

Why Reduce OST File Size?

There are several instances where an oversize OST file tends to slow down Outlook programs, file corruptions, and many more. Also, create hindrance while working in the form of errors. Some of them are listed below:

• Microsoft Outlook is not responding.
• Users cannot add additional data to the existing exchange .ost file.
• Consuming time while opening the OST file document.
• Retrieving data from the exchange server.

These are the consequences of large-size OST files. Therefore, users want to compress OST files in Microsoft Outlook. Now, let’s move further and know the detailed process to compact Outlook data files.

Note: If your OST file corrupt or damaged then you need to use the professional OST Recovery Software that repair OST file and split the large size of OST file into multiple parts based on size, date and sender email id.

How to Reduce OST File Size?

If you are facing the issue while working in MS Outlook, here we are going to discuss some possible ways to reduce Outlook data file size. You can shrink the file of your OST file manually and professionally.

Method 1: Compact Outlook Data File in Outlook 2016

Microsoft Outlook provides an option to its users to reduce the OST and PST file size. Follow the below-mentioned steps carefully to shrink the data file of Outlook.

• Open the desktop-based Outlook application on your system.
• Then, locate the File tab and tap on the Account settings option under the Account setting icon.
• Now, tap on the Data files tab and Double click on the file you want to compress.
• Press the Compact now button to start the compressing process.
• At last, hit the Ok button after completing the process.

This method will reduce Outlook ost file size temporarily. You can also try the below method if this doesn’t work.

Method 2: Clean up Mailbox data

In this method, users can clean their mailbox items by deleting their old and unwanted emails. To clean up your mailbox items, follow the steps listed below:

• Launch the Microsoft Outlook desktop-based application on your device.
• Locate the File tab and click on the Info tab.
• Tap on the Mailbox cleanup under the Tools icon.
• In the mailbox dialog box, tap on the View mailbox size button to view your current mailbox size stored in the local OST file.
• After viewing your data the deleting process will start and hit the Close button after completing the process.

Method 3: Transfer Mail Items from OST to PST or Archive Folder

Using this method, you can compact OST and keep the older emails by transferring the emails to PST. It will help you to reduce OST size without any loss of data. Follow the steps to execute the method in MS Outlook 2016 and 2019.

• Launch the Outlook program and click the File option.
• Now, tap on Tools and select Clean up old emails.
• After that, check the option Archive this folder and all subfolders.
• Now, select the folder that you want to archive.
• At last, click the Browse button to select the path to save archive files. Click on the OK button.

Professional Method to Reduce OST File Size

If you want to reduce your large-size OST files, you can download Aryson OST splitter software. This is a magnificent and risk-free utility that allows the users to split large OST files into smaller Outlook data files based on size, date, Sender’s Name, and folders. Also, it saves the resultant OST files into multiple Outlook data files to be easily accessed by the users.

Steps to Compress Outlook Data File

• Download and Run Aryson OST splitter Tool.
• Click on the Add files button to choose the OST file.
• Now, Add the OST file and click on the Open button.
• Tick the Mailbox items from the tree structure and Mark the splitting option based on size, date, sender, and folder.
• Select the Additional features as per your requirement.
• Choose the Path to save for the resultant file.
• At last, hit the Split button to start the splitting process.

Key Features of OST Splitter Tool

• The software allows the users to add OST files and folders.
• Users can split large-size OST files based on Size, date, sender, and folders.
• Allows saving the resultant file into multiple Outlook file formats.
• It creates a password to protect the PST file after splitting the OST file.

Conclusion

In the above post, we have described the consequences of the oversize OST file and the best possible ways to reduce OST file size. Also, we have explained how to split large-size OST files into multiple PST files by using OST splitter software. Furthermore, users can evaluate the software working by downloading the free trial version of the software.

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