To convert OST PST it is necessary that the concerned OST files must be in healthy condition. If the files are in deficient state, then they can be repaired by Kernel for OST to PST, which is a third-party tool. The tool provides different migrating and saving option that stands it different from other OST PST tools. The trial version of the tool gives clear idea about the tool. Visit: www.osttopstfreeware.net.