Firmware v01.00.0500 Problem

[gary49]

I just downloaded and installed the latest Mavic 4 Pro firmware v01.00.0500 onto my Mavic 4 Pro drone, creator version with the 512 GB internal storage. Prior to this upgrade the drone worked flawlessly. But after the upgrade, I cannot get any photos or videos off of the internal or SD media. If I connect the drone to my Windows 11 or Windows 10 PC, I get a message that the drives are not formatted. If I format them from the drone, and take a few pictures, I can not access the media either from a PC or by removing the memory card and inserting it into a USB reader and into my PC. Inserting the USB reader into the PC with the memory card within it, I just get the same error message that the media needs to be formatted. So I connected the drone to my PC and using the DJI Assistant software, I downgraded to the next lowest version that I was presented with, v01.00.0300. This did not fix the problem. I still can't get the media off of either the internal or SD media. The photos are there, and I can transfer them to my phone and then to my computer, and they are fine. But I can't get them off in the usual manner. Does anybody have any suggestions? Anybody else updated to this firmware and not have this problem?