Corrupt Offline Storage Table (OST) files can be repaired through free Inbox Repair Tool (Scanost.exe) but it’s not efficient enough to fix severe OST corruption issues. Use an authentic OST file to PST software like Recoveryfix for OST to PST to recover corrupt OST files. The software displays a user-friendly interface and so non-technical users can operate it easily. The advanced tool is available in free trial version also.