Using one of the best and amazing tool i.e, DRS OST File Recovery Tool. The utility can easily restore the corrupt or inaccessible OST data and allows to convert it to PST, MBOX, EML, MSG, DBX, etc. It provides three recovery modes i.e, Standard, Advanced, and Deep mode. The tool is compatible with all Windows versions. You can also download the demo version which is free to evaluate the performance of the software.