In Power BI desktop, The File category provides the following data connections:
It doesn't support .dat file. As I know, DAT can be a text-based, video-based, an attachment, or some other kind of files. If your .dat file is text-based, I would suggest you convert it to text file, then, connect to this text file in Power BI desktop. But the data imported to Power BI might be unreadable.
Regards, Yuliana Gu
Community Support Team _ Yuliana Gu If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.