If you don’t know what software is best to convert OST file to PST file then just use OST to PST 32 bit software which smoothly recover selective single or multiple OST file and convert outlook OST emails into PST, EML, MSG, HTML, RTF, TXT, DOC, PDF, MBOX and outlook profile etc. This software easily Convert OST appointments into ICS and contacts into Vcard formats. OST File Converter easily convert OST as PST with PST Splitting option upto 5GB