How large can an Outlook data file be?
Joseph Russell
Updated on May 17, 2026
Also to know is, what is the maximum size of an Outlook data file?
50 GB
Also, what is the maximum PST file size for Outlook 2010? 50GB
Furthermore, does Outlook have a data limit?
The Outlook data file has a specific data limit for storing the data items. Like, Outlook 97 to 2002, a maximum size limit is 2 GB. Outlook 2003 and 2007 has a maximum 20 GB limit. In Outlook 2010, 2013, and 2016, a maximum limit has been set to 50 GB.
How do I make my Outlook PST file bigger?
For example – You can raise the Outlook PST file size for latest versions from 50 GB to 100 GB. This is done by editing the registry entries. MaxLargeFileSize - This registry entry can be used to set the maximum size up to which Outlook PST file can expand (for UNICODE format PST files).
Related Question Answers
What do I do when my PST file is too big?
Manage the size of your mailboxpst) and empty your Deleted Items folder. Click File. Click Tools > Mailbox Cleanup. Select View Mailbox Size, Find items older than, Find items larger than, View Deleted Items Size, Empty Deleted Items folder, View Conflicts Size, or Empty Conflicts to perform your desired task.
How can I reduce the size of my PST file without Outlook?
Follow the Steps to Reduce PST File Size without Outlook- Step 1: Download and install the PST Splitter Software.
- Step 2: Choose Outlook format & Split option (Split by Size, Folder, Date, Year, and Email ID)
- Step 3: Specify size in MB in which you want to compress PST file without Outlook & Click Next.
Does archiving reduce mailbox size?
The archive. pst file can be created and updated at any location you specify, usually your local hard drive. Archived items are removed from your Outlook mailbox size and moved to the archive file based on the settings you determine.What has reached the maximum size to reduce the amount of data in this file permanently delete?
“The Outlook data file has reached its maximum size. To reduce the amount of data in this file, select some items that you no longer need, and then permanently delete them by pressing SHIFT+DELETE.” Since Outlook 2010, the size has been raised to 50 GB.What is the difference between OST and PST?
The basic difference between OST and PST is that OST files are used to save data for offline use and are stored in MS Exchange Server. Whereas PST files are personal folder data and stored on the client's hard disk. Microsoft is a renowned company that has a bag full of applications and utility tools.Will a large PST file slow down Outlook?
Will a large PST File Slow Down Outlook?- It's Resolved. An oversize PST file is not a common issue. This can directly affect the performance of MS Outlook.How do I reduce my Outlook mailbox size?
Reduce your mailbox size- Click the File tab.
- Click Tools > Mailbox Cleanup.
- Select View Mailbox Size, Find items older than, Find items larger than, View Deleted Items Size, Empty Deleted Items folder, View Conflicts Size, or Empty Conflicts to perform your desired task.
How do you configure the size limit for both .pst and .ost files in Outlook 2019?
In order to modify registry entries, follow these steps:- Click Start, and then click Run, type Regedit, and then click OK.
- Navigate to HKEY_CURRENT_USERSoftwareMicrosoftOfficex.
- Click PST, and then right-click MaxLargeFileSize in the right pane.
- Click Modify, and then type the value in the Value data.
- Click OK.
How do I find my Outlook data file?
Locating the Outlook Data Files- Select File > Account Settings > Account Settings.
- Select the Data Files tab.
- All Outlook Data Files (. pst) and Offline Data Files (. ost) are listed along with the name of the account the files are associated with.
How do I check the size of my PST file?
Right-click on the PST and or any folder contained within then select Properties > Folder Size.How do I increase the size of my Outlook 2010 PST file?
Expand 11.0 for Outlook 2003, 12.0 for Outlook 2007, or 14.0 for Outlook 2010, 15.0 for Outlook 2013, or 16.0 for Outlook 2016, and then expand Outlook. MaxFileSize in the right pane. Click Modify, and then type the value in the Value data box. Click OK.How can I send large files through outlook?
To send attachments via Large File Send from the Microsoft Outlook client :- Create a Message.
- Click on the Mimecast tab.
- Click on the Attach Large Files icon.
- Select the Files you want to attach. Note:
- Click the Send button.
- Amend the Large File Send options as required: Note:
- Click on the Send button.