Use Advanced free convert OST to PST tool which smoothly convert OST file to PST free from any of OST file version (5.0, 5.5, 2000, 2003, 2007, 2010 and 2013). With this excellent application free conversion OST to PST becomes simple and easier. Without any obstruction OST extractor tool smartly works to repair OST file and move OST to PST. It preview heavy OST file into small PST by splitting it into the given file range.