If the rationale is that you don't want Chinese drones secretly phoning home with data over sensitive assets in the US, just banning federal agencies from using them isn't going to protect national security.
If that really is the reason they'd...
Would DJI bother to try to export only for LE agencies? That would be a fraction of the volume they ship now, so maybe not worth the hassle.
The EO says no federal agencies can buy Chinese drones. But states and local governments aren't...
I don't have a Mavic 4. Have an Air 3S coming to me.
So I will test with that, though may pick up a small micro SD card reader but who knows what transfer speeds will be like.
I think they didn't implement the fastest USB-C speeds on that port...