It looks like you're summarizing the available methods for converting OST to PST, including manual techniques and free tools. However, there seems to be a small inconsistency: RecoveryFix OST to PST Converter does not have a fully free version—only a demo that previews data. https://www.recoveryfix.com/ost-to-pst-converter.html
Clarified Summary of Free & Manual Methods
1. Manual Methods (Free but Limited)

White check mark a. Outlook Import/Export (If OST is accessible)

Steps:

    Open Outlook with the OST file.

    File > Open & Export > Import/Export > Export to PST.

Limitation: Only works if the OST is not corrupted and still linked to an Exchange account.

White check mark b. ScanPST.exe (Microsoft Inbox Repair Tool)

Steps:

    Locate ScanPST.exe (e.g., C:\Program Files\Microsoft Office\root\OfficeXX).

    Run it to repair the OST, then export via Outlook.

Limitation: Only fixes minor corruption; may not recover all data.

1. Free Tools (With Limitations)

Warning️ RecoveryFix OST to PST Converter

Free Demo: Previews data but cannot save full PST without a license.

Paid Version: Starts at $49 (full conversion).

1. Important Cautions

   X Avoid cracked software (malware risk).

   Warning️ Free tools often watermark or restrict exports.

   Wrench For severely corrupted OST files, paid tools (e.g., Kernel, RecoveryFix) are more reliable.

Best Free Option?

If your OST is healthy, use Outlook’s built-in export.

For corrupted files, try ScanPST.exe first, then a free tool demo (e.g., RecoveryFix).

For full conversion, consider paid tools (RecoveryFix, Kernel, or OST2).

Would you like detailed steps for any of these methods?