These include emails, contacts, calendar events, tasks, and other data types.
Every OST file created is automatically saved in the default location.
If you want to know how to recall an email in Outlook, this post is what you need.
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This post provides detailed steps for you to do that.
How to Find Outlook OST File Location
Where is the Outlook OST file?
There are 2 ways for you to find it.

Step 1: Press theWindows+Ekeys together to openFile Explorer.
Step 2: The different Outlook version has different default file locations on Windows.
you gotta go to the corresponding location based on your Outlook version.

Here, we take Outlook 2019 as an example.
Step 1: Open Microsoft Outlook.
Go toFile > Info >Account tweaks>Account tweaks….

Step 2: Click theData Filestab and grab the OST file.
Then click theOpen File Location…button.
How to Change the Outlook File Location
Some Outlook users want to change their OST file location.
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Here is how to do that:
Step 1: Press theWindows + Rkeys together and typeregedit.
Then, click OK/.
Step 4: TypeForceOSTPathand pressEnter
Step 5: Then right-click theForceOSTPathregistry key and then chooseModify.
It allows you toautomatically back up dataandonly back up changed files.
Here is how to use it:
Step 1: Download and install MiniTool ShadowMaker.
Launch it to enter its main interface.
Step 3: After performing the controls, you could clickBack Up Nowto start the task.
What is the OST file?
How to back up OST file in Microsoft 365?
This post provides 3 ways for you to do that.
Final Words
Where is the Outlook OST file location?
How to find the Outlook OST file location on Windows?
How to back up Outlook OST files?
I believe that you have found the answers in this post.