I moved 13000 unread emails from one PST file to another file but the size of old file still same RRS feed

  • Question

  • I am using Microsoft Office Outlook 2007 , My file (PST) size reach to 13.6 GB, sometimes it create problem i.e (data file check runs), I try to reduce the size of this file and moved unread emails of approx 13000 in No.s and almost 2.5 GB in size to another Outlook Data file (PST file) in same Outlook, same PC, but the size of 13.6 GB PST file size still not reduce, it is still same. However all unread emails are moved to new outlook data file.

    Can anybody help me in this regards ? I want to reduce the size of PST.


    Friday, December 8, 2017 9:11 AM

All replies

  • Hello Dear,

    Moving emails from one PST to another is not a solution. Instead of doing this you try another solution like Compress PST file (using Microsoft Outlook inbuilt feature), archive PST file, delete some unwanted emails, etc.

    Please see the below links and know how to reduce the size of PST file using multiple method.


    Thanks & Regards,
    Kelvin Howard

    Friday, December 8, 2017 9:59 AM
  • Hi Jamil,

    Generally, if you want to immediately reduce the size of the PST file, you can follow the steps below to force a compaction: 

    1. On the File menu, click Data File Management.
    2. Click the data file that you want to compact, and then click Settings.
    3. Click Compact Now.

    For mote information about reducing the size of Outlook Data Files, you may refer to the article below:


    By the way, since Outlook 2007 has reached its End of Life, it is strongly recommended that you upgrade to the main streaming products like Office 2013 or Office 2016 for better support and user experience. 

    Hope the above information can be helpful.

    Best regards,
    Yuki Sun

    Please remember to mark the replies as answers if they helped.
    If you have feedback for TechNet Subscriber Support, contact tnsf@microsoft.com.

    Monday, December 11, 2017 3:10 AM
  • Hi Jamil,

    How's everything going with this issue?

    If the post above is helpful, could you please help mark it as answer so that it would be easier for others who might have a similar issue to find the useful information?

    Best regards,
    Yuki Sun

    Please remember to mark the replies as answers if they helped.
    If you have feedback for TechNet Subscriber Support, contact tnsf@microsoft.com.

    Thursday, December 14, 2017 10:02 AM
  • To compress your outlook PST files in one single file use outlook PST Compress Software. Compress PST Software is an excellent outlook email management tool that allows outlook user to compress their PST file's created by MS outlook 2016, 2013, 2010, 2007, 2003, 2002 etc. in one single file. Software is available with free demo version and can be used in all Windows-based platforms including the latest Windows 10.

    Visit at ; http://www.osttopstapp.com/compress-outlook-pst.html

    Thursday, November 15, 2018 8:52 AM
  • This Outlook PST Compact Tool can easily compresses the size of the Outlook PST files, while compressing the data of the PST file this software do not harm the data as well as it preserves the interlinking between the files as well as the attachments. The Compact PST software while compressing the data extracts all the attachments and saves it to another folder. It cleans up all the white spaces from PST emails and also preserves the emails originality as well.

    Visit here to follow this link :- http://www.toolsbaer.com/outlook-pst-compact/

    • Edited by HawesHughes Wednesday, April 17, 2019 4:42 AM
    Wednesday, April 17, 2019 4:42 AM