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Split PST File

Split PST File
Splits large PST data file into several smaller PST files.
Version: 4.18 released on June 8, 2021.
(4.8 / 138 reviews)

Split PST File for Outlook
"Split PST File" has an advanced version

Split large PST data files into smaller ones. After new PSTs are created, source data files remain unchanged. Attach the resulting personal folders to the Outlook profile or save them on disk. Split PST using different criteria of your choice, retaining the original data and folder structure.

  • Split Outlook PST file into smaller parts according to a specified date, sender/recipient email address, subject, size, or folder.
  • Split all PST formats, modern Unicode and obsolete ANSI.
  • Keep original elements and folder hierarchy intact.
  • Attach or detach split data files to/from Outlook.
  • Skip Deleted Items if necessary.
  • Specify a period in the handled PST to split the file into multiple files.
  • Split many PSTs into different locations using the command line.
  • Organize PST data files directly from Outlook or use a standalone app without opening Outlook.

How to manage large PST files

An oversized PST file is hard to manage, slows down Outlook's performance, and is prone to data loss and corruption. An already archived .pst file might be too large to open in an Outlook account. Too large PST file in the Outlook account usually means it has been created a long time ago and contains data that no longer has to be included in your regular backups.

You can reduce the size of PST file manually via standard Outlook tools, choosing one of these options:

  • Move to Folder option:
    1. go to File > Account Settings > Account Settings...;
    2. follow the Data Files tab and click the Add... button to add a new PST;
    3. use the File > Open & Export > Open Outlook Data File button to open the old Outlook PST file;
    4. in the old PST, select messages or other Outlook items you want to move;
    5. right-click on the selected items and select Move > Other Folder... in the menu;
    6. select a folder in the newly created PST to move the selected items from the old one.
  • Import and Export Wizard:
    1. go to File > Open and Export > Import/Export;
    2. choose the Export to a file option, and click Next;
    3. on the Export to a File step, select Outlook Data File (.pst), and click Next;
    4. on the Export Outlook Data File step, select Outlook folders to export, and click Next;
    5. specify the location for the new PST by clicking the Browse... button, and click Finish;
    6. now, delete exported folders from the source data file to reduce its size.
  • Archiving method:
    1. go to File > Info >Cleanup Tools > Archive...;
    2. select the desired folder to archive and the date you want to archive items older than;
    3. specify the location and the name for the archive PST, and then click OK.

The aspects of manual methods:

  • By moving the data manually, you risk losing important information beyond recovery.
  • The data may not be copied completely, and some properties may be lost.
  • The manual way is very time- and energy-consuming.
  • Manual methods require certain technical knowledge.
  • In a complicated process, it is easy to lose command over it.

How to split PST file

The fastest and easiest way to manage a large PST file is to split PST with an automated PST file splitter. Using Split PST software will save time and effort. Avoid all the risks of manual methods, keep the data safe. Our utility splits PST files most accurately, saving all required data.

Enjoy the flexibility and multiple settings ranges; break up a large PST file according to your preferences, set in a few clicks.

How to organize PST files when splitting them

Our Split PST tool reduces the size of a large PST and helps you organize the data while splitting. Choose an option you want your split personal folders to be based on, and split Outlook PST file by:

  • date, time or year;
  • sender's email or name;
  • first recipient's email or name;
  • message subject;
  • Outlook folder;
  • mailbox or data file name.

The final data will be placed in the folders named according to the selected criteria from the list. You can also set a folder name by current date/time or year only.

Additionally, you can decide whether to process the Deleted Items folder in the source PST or skip it.

How to split a PST into smaller files setting the size

Once you have specified the options for splitting a large PST into parts, you can set the final files' maximum size (optional). If you set the maximum size, each criterion's resulting PSTs will be additionally split by size.

How to split PST file into smaller parts for the specified period

You can define a period for which new PSTs based on the desired categories will be created. Choose a standard period like date, week, month, or year, or set a specific period or a condition of your choice.

How to split PST file without starting Outlook

You can reduce the size of large PSTs and organize new .pst files without launching Outlook. Start the utility from the standalone launcher application and choose the required file to split.

You can view your split Personal Folders in Outlook after the splitting is completed. They are attached to the Outlook profile by default. If you wish to archive the results without adding them to Outlook, simply choose the Detach new PST files from the Outlook profile option.

How to split PST files from multiple mailboxes

The command line app in the Professional Edition of the utility allows splitting multiple PSTs from different locations. Create your batch scripts and PowerShell scenarios based on a size or a date. Command line enables splitting multiple .pst files into smaller ones in a single operation.

FAQ

How to split an archive PST file?

If you need to split the Personal Folders archive, select the required data file when configuring the utility. Following the further steps, you can quickly split and organize archive PST folders in a few clicks.

How do I split a PST file by month or year?

You can configure any date range when using the utility:

  1. Choose the PST file to split.
  2. Specify the destination path and select the first Date/Time item in the macro menu,
  3. In the sub-menu, select Year only to split PST file by year.
  4. To split PST by months, select Date only in the menu and edit the macro format by removing the day part: {DATE#yyyy-MM}.
  5. Click the Run button. After the process is completed, the results will be in the folders named by years or months.

How to split my big .pst file in half?

If you only want to reduce the size of a big PST, use the Maximum file size setting. Set the value equal to half the source size or whatever you like.

Can I split the PST file into multiple files and upload them to an Outlook mailbox?

To upload new split Personal Folders to Outlook, just leave Detach new PST files from the Outlook profile option unchecked. The split PSTs are shown in your Outlook profile by default.

How to merge split Outlook PST?

To merge all or several split PSTs back, use the Merge PST utility.

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* This utility is for non-commercial home use only. It will not run in domain enviroment. Some of the described features and support for domain enviroment are available in advanced version of the utility only. Free version may have additional limitations.


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