SD card files do not show in Windows 11 and asking to format

Hello All,

I recorded footage from my Blackmagic 4k camera, but cannot download the footage to my Windows 11 computer. When I insert the SD card, it says "format the SD card". But when I insert the SD card into the camera, I can see the footage. Then I tried using a USB-C cable through the camera, but the folder showed empty when I connected it to the computer. I'm very worried as I have 2 hours of school recording of an event. How can I download the file to my Windows 11 computer? Appreciate anyone's input and help.

Could it be formatted for Apple (HFS+}?
There is software to handle that by developers like Paragon.