If you want to transfer MSG files to PST files without losing anything, I think you should use DailySoft MSG to PST Converter. I used it myself to change a lot of MSG files to PST files. It kept all the attachments, the way the emails looked the information about the emails and the way the folders were set up. The program is simple to use. It works well on Windows computers even if you do not have Microsoft Outlook on your computer. It can also change a lot of MSG files at a time, which saves a lot of time when you have many MSG files to change. The free version lets you change MSG files in each folder so you can see how well it works and what it can do before you buy the full version of GainTools MSG Converter.