You can convert MBOX to PST files in two ways: manually and professionally. For manual conversion, first import your MBOX files into Thunderbird using the ImportExportTools NG add-on. Then, export the individual EML files using Thunderbird’s “Export to Mail” function. Drag and drop these EML files into Outlook and export them there to a PST file. This completes the manual conversion from MBOX to PST. However, the manual conversion is quite time-consuming, tricky, and also has a risk of attachment loss from the original emails. Therefore, using professional software like the Advik MBOX to PST Converter can help simplify the process of converting your MBOX files to the PST format without the loss of data. Based on my experience, professional tools can be more convenient than manual methods, especially for large files. However, the best method depends on what the user needs.