I needed to move several OST files to PST so I could use my data on another Outlook setup. After looking for a reliable tool, I found the MSOutlookHelp OST to PST Converter, and it worked great. The software was easy to use and made the conversion quick and simple, even with big files. All my emails, attachments, and calendar events were saved perfectly, without any trouble. I also used the batch conversion feature that let me convert multiple files at once without the data loss. Moreover, this tool made the whole process much easier than I thought, and I'd recommend it to anyone who needs a fast and safe way to convert OST to PST.