I usually try and remember to turn screen recording on plus the controllers have video cache and its good for lower resolution copies in case the drone is lost.
Sure is easier with an internal SSD of that size, designed for All-I. The faster still frame shooting makes it worth the risk of losing the day's shoot, if the drone becomes unrecoverable, and one is unable to copy off the recordings in between...
I installed a Lexar 1TB Professional Silver Plus Micro SD Card in my MP4 Pro and although the SD card has a write speed of 150MB/s, I prefer to defaulr to internal storage with 512GB in my creator combo version.
The following is gleaned off...
The drone doesn't support faster microSD cards because it's limited by the hardware in the drone, there are several faster types of micro SD cards but the Mavic 4 doesn't have the hardware to use them. The older UHS-II spec offers faster speed...