What does the Outlook Data Files Message Mean?
You see this message when you double click a data file in File Explorer. The file is fine, and Outlook only tells you the correct method.
A PST is a data store that Outlook must attach to a profile. Windows cannot open it like a document.
Only messages and calendar items in MSG and ICS format open by double click. Other data files need Outlook to open them.
How do You Open the Data File From Within Outlook?
Method #1: Open Outlook Data File (Free)
- Start classic Outlook.
- Select File, then Open & Export.
- Select Open Outlook Data File.
- Browse to the file. Outlook saves new files in Documents\Outlook Files.
- Select the file and then OK.
The data file appears as a branch in your folder list. Right click the branch and select Close when you finish.
Method #2: Import the PST File (Free)
Import copies items into your mailbox, so use it when you want everything in one place. Microsoft documents the import steps for classic and new Outlook. Our guide to import a PST file in Outlook compares both routes.
Heads Up. New Outlook opens PST files only with classic Outlook installed, the same 32 bit or 64 bit build and a Microsoft 365 subscription, as Microsoft states.
What if Outlook Still will Not Open the File?
- Copy the file from an external drive to your local drive.
- Right click the file, select Properties and clear Read only or select Unblock.
- Close Outlook and use the Inbox Repair Tool when the copy came from another computer.
- Check the file size and the Outlook version, because old Outlook builds cannot open some newer files.
Our Outlook data file errors guide matches other messages with their fixes, and the PST repair tool guide explains damaged files.
Frequently Asked Questions
Why can You Not Double Click a Data File?
A PST is a data store, not a document. Outlook must attach it to a profile.
Is the File Damaged When This Message Appears?
No. The message is normal behavior and does not point to damage.
How do You Open a PST File in Outlook?
Select File, Open & Export and the open data file option. Browse to the file and select OK.
Where does Outlook Save New Data Files?
New PST files go to the Documents\Outlook Files folder by default.
Can New Outlook Open These Files?
Yes with limits. Microsoft requires classic Outlook, the same architecture and a Microsoft 365 subscription.
How do You Remove an Opened Data File?
Right click the file in the folder list and select Close.
What if the File is Read Only?
Clear the Read only box in Properties, or select Unblock when Windows marks the copy as blocked.
Author's Verdict
This message is a pointer, not an error. Open the file from the File menu in Outlook.
Check the read only flag and repair the file only when the open step still fails.
Key Takeaways
- Double click does not open data files.
- Use the File menu to open the file.
- New Outlook has extra requirements.
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