No more removing gimbal cover and turning the drone on (Would get very hot)  to access the files internal and microsd, just plug in and memory instantly accessable just like a memory stick. Another easy way to download your files.

Also recognised by my TV as a usb drive, great to review files before dowloading to PC, Tablets etc.

I really like this feature.

That's nice. the Mini 3 Pro doesn't have that feature sadly

This is really a very practical improvement that I also like  

This should also be possible to introduce on the Min 3 Pro via software

Space Dream Posted at 9-28 10:17
This is really a very practical improvement that I also like  

This should also be possible to introduce on the Min 3 Pro via software

you've got to remember that not everything can be added via firmware. besides, DJI isn't going to do any more anything to the m3p because of the m4p. I wouldn't do any firmware updates because they are probably going to try and limit the m3p so that we will buy the m4p.

Space Dream Posted at 9-28 10:17
This is really a very practical improvement that I also like  

This should also be possible to introduce on the Min 3 Pro via software

Not neccessarily, their is different hardware that enables this, software won't enable it, same with HDMI out on the RC2, the hardware inside for the USB port will be different to the RC1.

Hi there, Mavic57pro2. We're glad that you are satisfied with the new features available for the DJI Mini 4 Pro. If you encounter any issues with the unit or if you have any concerns, feel free to contact us. We are more than happy to help. Thank you for your valued support.

This is a welcome addition for sure.  

I can't say anything about these hardware statements but I'm not convinced
that this can't be done via software control but that's pure speculation on my part.
Is also everything not really so important that it would be a must have.