You can go with SysInspire OST to PST converter software. This is one of the best tools that can help users to fix any error within one click. It can show the preview of an OST file during conversion. It can convert OST to PST, EML, EMLX, Office 365, HTML, Etc. It has 10+ file formats for conversions and it can change the name of an OST file while converting. It can change the file saving location. This is 100% free and safe for every user. It has tech support 24x7 users can get help by using mails or live chat.
want to fix Outlook OST cannot be Opened I advise you to download the eSoftTools OST Converter application. The OST to PST, EML, EMLX, Office 365, Yahoo Mail, Gmail, MSG, and other file formats are all converted using this program. Users can convert 25 things from each folder in the demo version, which is free. All Windows OS versions are supported. With PST splitting, users can divide PST files into manageable chunks.