The drone produces the required folder and data to successfully import into the Edge. If you are copying the photos from somewhere else and want to import it has to be as follow.
In order to import your drone photo folder it has to be in a directory format structure for Edge 2 to understand it and should be as example:
D:\DCIM\100_0003-Pit-PPK_230809
D (SD card drive letter) \ DCIM (folder name form DJI) \ 100_0003-pit-PPK-230809 (flight mission name)
The entire folder along with all the data produced by the drone should be into folder in this format to then import Edge2.