OST to PST Microsoft tool is well equipped, reliable and authentic software that professionally works on orphaned OST file and recover data from OST file to PST. OST to PST application marvelously scan data from OST file and re-open OST file into PST, EML, MSG,MBOX, HTML,etc formats. During OST to PST conversion process, its split recovered large PST file into small PST file format (1 GB to 5 GB).