Tizen Developers

Step #1 Locate your OST Files
Click File > Account Settings > Account Settings.
Account Settings

Now, click on the Data Files tab, select any OST file, and click on Open File Location button.
Select and Open File Location

Note: Generally, OST files can be found here irrespective of the Outlook version-

C:\Users\user\AppData\Local\Microsoft\Outlook

Note: It is to note that the AppData folder might be hidden; hence, the user has to unhide it first. To do so, in C:\Users\user, click on View tab > Options. Go to the View tab, expand Hidden files and folders, and select Show hidden files, folders, and drives.

Step #2 Export your OST File as PST
In MS Outlook, click on the File tab > Open & Export > Import/Export. This will open up the Import and Export Wizard.
Here, select the Export to a file option and hit Next.
Import and Export Wizard

This will open up Export to a File dialog window, select Outlook Data File (.pst) option and hit Next.
select v

Now click on the required email account and select the item that you want to export as a PST file and hit Next.
select OST file to export in PST

Now click on the Browse button to save the PST file to the desired location and hit Finish.
Finish the process to save OSt in PST file

Congratulations! You have successfully converted an OST file to PST. Now we will explore ways to import this file to Gmail.

Step #3 Import PST to Gmail via. G Suite Migration for Microsoft Outlook (GSMMO) tool
G Suite Migration for Microsoft Outlook (GSMMO) desktop application lets the user import the PST file to the user’s Gmail account. The process is described below:

In any browser, search for G Suite Migration for Microsoft Outlook and download the application.
Launch the application by searching for it.
G Suite Migration for Microsoft Outlook

You will be asked to provide the login information, click Continue to proceed.
login G Suite Migration for Microsoft Outlook 

This will open up the sign-in page in your default browser.
open up the sign-in page

Next, you will be asked with a message that GSMMO wants to access your Google account. Scroll down and click on the Allow button.
Allow to access Google account 

If everything goes well, then you should see a confirmation message as shown below:
confirmation message

This will open up a new dialog window. From the drop-down menu, select From the PST file(s) option and click Next.
select the PST file

You will be taken to the location where all outlook PST files are saved. In step 1, if you have saved your converted PST file to a different location, then paste that location’s filepath in the Address bar.
The file is now imported, click Next to proceed.
PST file imported

Adjust the migration settings as required. Once done, click on Migrate.
Adjust the migration settings

This will initiate the migration process. Depending upon the size of your PST file, the process might take a while. Once done, you will be prompted with a message of successful migration.
successful migration done

Log-in to your Gmail account and look for the newly imported PST file in the left pane.
New PST file created

Congratulations! You have successfully migrated your Outlook PST file to Gmail.

Click on your Google Account icon and select on Manage your Google Account button.
From the left navigation, pane chooses Security. Make sure that the 2-step Verification is turned on (otherwise, this won’t work!). Next, choose App passwords.
Now, from the drop-down menu, choose Other (Custom name).
In the text box, enter Kernel Import OST to Gmail and click on GENERATE.
Copy the generated password for later use. Click Done.
 

Regards,
Peter

Looking for best solution to import OST to Gmail? You can rely on BitRecover OST to Gmail Wizard, where users are allowed to batch import Outlook OST file into Gmail. Also, there is a option for selecting OST files and folders. Moreover, it can maintain all email metadata and integrity. Plus, there is no need for Outlook installation in order to perform conversion. Furthermore, you can save resultanat data into destination of choice.