Convert Bulk OST Files to PST - Version 3.6 Many companies are now shifting their email application from Outlook to PST in bulk mode. To do this, companies have to convert their Outlook mailbox as OST to PST file format and it is achievable to bulk OST files to PST conversion manually. However, manually converting the procedure is not only extended and sustained but it also commands for good technological information. Any mistake in the process may lead to corruption in OST files. To recover damaged OST files folder you can easily get the bulk OST file converter software. When you will try this software to convert bulk OST files to PST then you will get the best output in bulk OST files to PST conversion. But here is one condition, to convert bulk OST files to PST you have to pay only $199.