Wondershare Filmora Portable [upd] Instant

Converts Outlook OST to PST file without making any changes to its original file structure

Converts corrupt or orphaned OST file into working PST file
Allows to search for an OST file & preview its items
Saves converted emails in PST, EML, MSG, RTF, HTML, and PDF formats
Arranges scanned emails as per Date, Type, To, From, Subject, Importance, and Attachment
Save and load scan results in DAT file Exports PST file to live Exchange Server & existing Outlook profile (Tech version Only)
Allows Users to convert multiple OSTs to PSTs (Tech version Only)
Saves contacts in CSV, and converted file in Office 365, DBX, MBOX saving formats (Download Tech Version)

: Since you are working off a portable drive, enable the "Backup my project" feature in settings to avoid losing progress.

Even if a portable version is virus-free (which is rare), it often lacks the full functionality of the official software:

A: No. The only legal way to remove the watermark is to purchase a subscription or a perpetual license from Wondershare.

: Ensure your host PC has at least 8 GB of RAM (16 GB for 4K) to avoid lag.

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* Free download version of the OST to PST converter allow you to preview the converted file and save 20 items per folder

Wondershare Filmora Portable [upd] Instant

: Since you are working off a portable drive, enable the "Backup my project" feature in settings to avoid losing progress.

Even if a portable version is virus-free (which is rare), it often lacks the full functionality of the official software:

A: No. The only legal way to remove the watermark is to purchase a subscription or a perpetual license from Wondershare.

: Ensure your host PC has at least 8 GB of RAM (16 GB for 4K) to avoid lag.

Software Screenshots & Specification

Name: Stellar Converter for OST
Version: 13.0.0.1
Version Support: MS Outlook: Office 365, 2021, 2019, 2016, 2013, 2010, 2007
Processor: Intel compatible (x64-based processor), including Parallel, Surface, and Snapdragon
OS Compatibility: Windows 11, 10, 8.1, 8
Memory: 4 GB minimum (8 GB recommended)
Hard Disk: 250 MB for installation files