Depending on the quantity and needs of your data, you must select the appropriate method for a seamless EML to PST conversion. Making a backup of your EML files before beginning the conversion is one of the finest methods. Your original data will be secure if something goes wrong. Prior to conversion, always arrange your EML files into the appropriate folders. It will be easier to select the files when you enclose them and easily convert EML files into PST format, I suggest you use an automated tool like SameTools EML to PST Converter. An automated tool can offer accurate conversion, particularly when handling a big dataset. With this tool, every email information is accurately retained during the conversion.

For more information: https://www.sametools.com/convert/eml/