Many applications focus on free unlimited OST to PST conversion.
I once had an issue I.e. my file was not opening. So, I preferred to go use a third party tool which is the SysInspire and converted my ost file to pst.
I will therefore suggest you try the SysInspire OST to PST converter for free conversion. I am sure you can get perfect solutions.
The free unlimited OST to PST converter by SysInspire truly satisfies the user to the core and he or she can convert 25 items from every OST mailbox folders.
Here you have to first scan the OST items so they get a preview of it before ultimate conversion.
To know better about the functioning of the tool, we have to overlook the steps.
First, you have to download the SysInspire free OST to PST converter software, then the software is unlocked.
By selecting the Add OST button, assign the OST file.
Then open the chosen OST file. Then the user checks the preview of OST mailbox data.
Then ultimately convert the OST files to it’s proper located PST file.
More info:- Free automated ost to pst converter tool