DEV Community: Rajat jaw

How can you manage Large PST file in Microsoft Outlook?

Rajat jaw — Sat, 10 Oct 2026 07:24:46 +0000

Microsoft Outlook is a personal information manager and email client developed by Microsoft which is widely used for managing emails, contacts, calendars, tasks, and other mailbox information. It uses two different types of data files to store and access the information, which are OST and PST files. As time goes, Outlook PST file size keeps increasing because of the data that users receives like emails, attachments and old email archives which are maintained.

Due to Large PST file mailbox data becomes difficult to manage, Outlook experience slower performance, Outlook faces problems opening and accessing the file, etc. Sometimes a large PST file may become more vulnerable to corruption if it is stored on an unreliable drive or handled improperly. Managing large PST files is very important for maintaining Outlook performance and keeping mailbox data organized.

Why Does PST File Keeps Getting Large?

PST file keeps getting large due to years of incoming and outgoing emails keeps storing in same file.
PST files also gets large because its space gets consumed by oversized documents, images, videos, presentations, and other attachments.
Deleted Items and Junk Emails are the main reason due to which PST file becomes large as Unwanted messages continue occupying space until they are permanently removed.
PST file grow large because of keeping duplicate copies of email messages and attachments which increases the amount of storage required.

How to Manage Large PST Files?

1. Removing unwanted Emails and Attachments

You can manage a large PST file by checking your Inbox, Sent Items, Deleted Items, and Junk Email folder to remove unwanted emails, messages and attachments, also empty or clean the Deleted Items folder after deleting unwanted items.
You should always keep large attachment separately in another file or folder so that you can find and delete unwanted attachments easily.

2. Use Outlook's Archive option

Microsoft Outlook provides archiving options that allow you to move older emails into a separate PST file without keeping all mailbox information in your primary data file.
Archiving helps you to separate frequently accessed emails from older conversations which makes PST file more manageable.

3. Compact the PST File

When you delete emails or attachment an unused space left inside the PST file which cannot be acessed but by Compacting the PST file that space get reclaimed and PST file size get reduced.

Steps to compact a PST file in Microsoft Outlook:

First you have to open Microsoft Outlook in your window.
Then select File and open Account Settings in your Outlook.
After you Opened Account Settings, select the Data Files tab.
Now you can choose the PST file you want to compact.
After choosing PST file, you have to find the Compact Now option and then click on it.
Now you should wait until Outlook complete the operation.

After the process get completed you will see that the amount of unused space the file contains is compacted and you can use it again.

4. Splitting Large PST File into Smaller PST Files

The best way you can Manage large PST files is by splitting it into multiple PST files. They contains a large amount of mailbox data, splitting it into smaller files can make it easier to organize, back up, and transfer.

You can use Outlook's manual options to create separate PST files and move selected folders or messages into them which takes lot of time if your mailbox data is vast. A dedicated tool such as MailsDaddy PST Split Tool is best and reliable solution for this splitting process. It is designed to split large Outlook PST files into smaller PST files according to different splitting criteria like split by date, split by email, split by folder and split by size. This can help mailbox data organization and make large PST files more manageable.

What is MailsDaddy PST Split Tool?

MailsDaddy PST Split Tool is a simple,easy and reliable solution that helps you to split large PST files into smaller PST files according to your needs like split by date, split by email, split by size, or split by folder. It helps you in making email data easier to manage, store, and archive. It preserve the original mailbox data, including emails, attachments, folders, and other Outlook items, while splitting the PST file without any data loss. This tool is helpful for IT professionals, business users, and individuals who regularly work with large Outlook archives.

Precautions to help PST Files from Becoming Oversized

You should archive old emails regularly instead of keeping everything in one PST file.
You should remove unnecessary emails and attachments after checking them.
You should compact PST files when you want to reclaim unused space.
You should always organize archives by year, project, or department.
You should monitor PST file size and Outlook performance regularly.
You should avoid modifying the same PST file from multiple locations.

Conclusion

Managing large PST files is necessary for keeping Outlook data organized and reducing the difficulties that arises due to oversized mailbox archives. So, to manage PST file conveniently, we split it into smaller PST files. MailsDaddy PST Split Tool is a easy method for users who want to divide large PST files according to their needs. You can keep your Outlook mailbox more organized and make your email archives easier to manage over time by doing these practices.

Recover password from Outlook PST without MS Outlook?

Rajat jaw — Thu, 24 Sep 2026 07:17:47 +0000

If you forget the password of your locked PST file and want to recover it without installing MS Outlook, MailsDaddy PST Password Remover provides a straightforward way to remove the password protection. It is designed for users who need to access an old or locked PST without going through complicated manual methods. The tool can help process protected PST files and make the mailbox data accessible again, including emails, contacts, calendars, notes, and other Outlook items.

Key features:

It removes password protection from PST files.
It is useful for forgotten or unavailable PST passwords.
It provides Simple and easy-to-use interface.
This tool Helps access emails, contacts, calendars, and other mailbox data securely.
It is suitable for old or archived Outlook PST files.
It is designed for users without advanced technical knowledge.
It allows you to work with a copy of the original PST for added safety.

Overall MailsDaddy PST Password Remover is a best password recovery tool when you don't want to use MS outlook and want to regain access to a locked Outlook PST file.

Best OST to PST converter

Rajat jaw — Wed, 23 Sep 2026 11:15:04 +0000

MailsDaddy OST to PST Converter is designed to convert OST files into PST format and can also export data to formats such as EML, MSG, MBOX, RTF, and HTML. It provides a preview of the OST data before conversion and can maintain the original folder hierarchy.

Key features of Mailsdaddy OST to PST Converter:

It converts OST to PST and other formats.
It supports multiple OST files for bulk conversion.
It allows you to preview mailbox data before exporting.
It maintains the folder structure during conversion.
It converts emails along with attachments, contacts, calendars, tasks, and notes.
It provides date filtering and selective data conversion.
It can export OST data to Office 365 and Live Exchange Server.
It supports older and newer Outlook editions.

MailsDaddy also provides a demo version, so users can test the conversion process before purchasing the full version.

How to remove Password from Locked PST File?

Rajat jaw — Wed, 23 Sep 2026 06:46:12 +0000

If your PST file is locked and you forget the password, then no need to worry about it. You can easily remove the password from the PST file and can access your data by using MailsDaddy PST Password Recovery Tool. This tool provides a simple way to remove forgotten password protection from Outlook PST files without any hassle. The tool supports ANSI and Unicode PST formats while preserving mailbox data. It helps users to access their important mailbox items such as emails, attachments, contacts, calendars, and other Outlook data in just a few clicks. The tool is suitable for individuals, businesses, and IT professionals who need a convenient solution for managing password-protected PST files.