I am trying to convert my MBOX mailbox files into PST format so that I can open them in Microsoft Outlook. However, the conversion process keeps failing or stops in the middle without completing. In some cases, Outlook does not open the converted PST file, and in other cases, some emails are missing after the conversion. I have already tried using different MBOX files from Gmail and Thunderbird, but the problem still occurs. I am not very technical, so I am looking for a simple and safe solution. What are the common reasons why MBOX to PST conversion fails, and what is the best way to fix this issue without losing my emails?