By using an email migration tool, you can convert EML files into PST format quickly. Not every tool will convert files quickly; only a few well-known and expert-recommended tools will work properly and quickly. I use OSTtoPSTAPP EML to PST Converter for converting my EML files quickly and safely. It provides the bulk conversion, which allows users to convert multiple files at once and provides fast, accurate conversions. It retains every essential detail of the emails authentically and also maintains the hierarchy of the folders. You can preview your attached files before conversion and check that the files are correctly enclosed or not. This tool helps me a lot and saves me time and effort.

For more information: https://www.osttopstapp.com/eml-to-pst.html