OST File Size is Bigger Than Mailbox Size Issue

Admin | Published: 2020-07-27T09:26:53+00:00 | Email Tips

Summary: In this article we are going to resolve the problem faced by the Outlook users, OST file size is bigger than mailbox size. Also we will focus on the issues due to OST file size Larger than mailbox size. The user can read this article to know how to tackle with this issue.

Offline Storage Table or OST is the Outlook Data file that is the duplicate of a client’s mailbox on the Exchange Server that is privately stored on the PC/framework. This Outlook Data (OST) file holds the whole Outlook mailbox data since the hour of the last synchronization with the server.

The OST file helps the client to work offline if the Exchange Server isn’t accessible.

Even though the OST file is the specific copy of the client’s mailbox, its size doesn’t generally mirror the size of the mailbox. Other than mailbox items, there are numerous different items stored in the file which can take a bigger space. Items stored in the OST file rely on whether you are utilizing Exchange server or IMAP account. Before discussing why OST File Size is Bigger Than Mailbox Size Let us have a look at mailbox size versus OST file size.

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Mailbox Size Versus OST-File Size

You most likely currently observe that the mailbox size and the size of the OST-file can be very apart. Be that as it may, in any event, when you would disable all the extra reserving and store nothing in the “This Computer only” folders, the size of the OST-file could be very unique in relation to the size of the mailbox. This particularly applies to Exchange accounts.

The OST-file can be 20-30% bigger than the mailbox size when utilizing Outlook 2010 or the previous version. This is because of some storage inefficiency of the OST-file and the manner in which Exchange figures the mailbox size (Exchange 2013 and later computes it all the more precisely, however).

At the point when you use Outlook 2013 or later versions, the OST-file can really be up to 30% smaller than the mailbox size. This is because Outlook 2013 and later compress certain streams of text while storing it in the OST-file. You could contrast this with compressing a huge txt-file; it considers compression and along these lines brings about a smaller OST-file.

What is in the OST-file of an IMAP account?

In Outlook 2013, 2016, 2019, and Office 365, IMAP accounts use OST-files also.

For this situation, the OST-file is additionally for the most part utilized for reserving the mailbox data which is stored on the IMAP mail server. Be that as it may, the OST-file could furthermore contain some exceptional data which isn’t being synchronized with the mail server. These folders are set apart with “This Computer only”.

The accompanying folders don’t match up with the IMAP mail server:

  • Drafts
  • Sent Items
  • Trash/Deleted Items
  • Junk E-mail
  • Calendar
  • Contacts
  • Tasks
  • Notes

Issues Due to OST File Size is Bigger Than Mailbox Size

Because of a larger than average OST file, you may confront the accompanying issues with your Outlook:

  • The outlook may neglect to open or load OST file
  • An issue in adding data to existing OST file
  • Outlook Application may interrupt or stop unexpectedly
  • Error messages may show up during the synchronizing procedure
  • Inability to fix synchronization issue.

How to Reduce the Size of the OST-File

Reducing the size of the OST-file isn’t generally that simple and not generally required either. On the off chance that you are on a sensibly modern PC and are utilizing Outlook 2007 SP2 or later, your OST-file can be as extensive as 10GB you’d even won’t notice the performance.

Regardless, letting it become superfluously enormous isn’t the way either. To decrease the size of the OST-file, you can use the accompanying techniques:

  • OST-file Re-creation

After a significant Cleanup, you can decide to let Outlook re-create the OST-file as opposed to compacting it or anticipating compression. To do this, rename the OST-file to .old when Outlook is closed. After restarting Outlook, your mailbox will be recached in another OST-file.

  • Sync Filters

At the point when you have some huge folders, you can set Synchronization Filters to figure out what gets synchronized and stored in the OST-file.

  • Sync Slider

In Outlook 2013 and later versions, you can use the Sync Slider to just store later items instead of the whole mailbox. Note that for Outlook 2013 this just applies to your own mailbox and not to any extra shared mailbox you may have connected. For Outlook 2016, 2019, and Office 365, the sync slider applies to all stored mail folders.

  • Disable Caching of shared folders

On the off chance that you don’t require offline access to shared folders and don’t normally get to them, it is possible that you can disable the option to cache shared folders all in all or not to store shared mail folders.

  • Disable storing of Public Folders Favorites

Like storing of shared folders, you can decide to disable the alternative to cache Public Folder Favorites.

  • Evacuate some Public Folder Favorites

As opposed to disabling the alternative out and out, you could likewise evacuate some Public Folder Favorites or just select a couple of subfolders rather than reduce the size of data of being cached.

  • Gmail duplication

At the point when you use a Gmail account, items could be copied because of the folders you are bought in to. This additionally applies to Outlook 2010 and past which store the IMAP reserve in a PST-file.

If the OST file turns out to be an excessively enormous size, it’s smarter to take a backup and save the file in PST file format. You can convert over OST to PST as it very well may be effectively moved to other storage locations and brought into some other Outlook account.

To convert over an enormous sized OST file to PST. The user can take the help of expert solution. This tool can without much of an effort converts a huge size OST file to Outlook PST, inside a couple of clicks. The professional release of the tool can likewise part and minimal huge PST files, accordingly, guaranteeing the ideal execution of Outlook.

Also Read: Reduce Size of Oversized OST file.

Conclusion

At the point when Outlook OST File Size is Bigger Than Mailbox Size, reducing OST file size probably won’t be required consistently in any case; and regardless of whether it is required, it isn’t in every case exceptionally simple. While utilizing any sensibly modern PC and utilizing Outlook-2007-SP2 or any later form, at that point OST file greater than mailbox size as large as 10GB size and you would even now not notice any such performance hit. Be that as it may, all items considered, permitting it to become greater and greater in size absurdly is additionally not the best approach to work either. Along these lines, for slashing PST file size, one can decide on any of the manual techniques clarified above or utilize any great third-party tool as referenced previously.