Was just wondering what is the biggest sd card you csn use in the mavic? I know the manual says 64gb what do people use in there ph4 do u guys just stick to the recommended size?

I think a 64gb are more than enough considering that the mavic has a flight time between 25min to 27min, but even if you have the bundle with the 3 batteries the 64gb are still enough and then you can download the footage on your computer.
But is better to buy an SDXC class 10 U3 if you are going to shoot on 4K

I use sandisk pro for the p4 32g is more than enough

Thanks for the question. I was wondering that too.  I want to do a 4k video dump that will max out the air time in a single battery and wanted to know what sort of compression and file size I might end up with.

A Sandisk class 10  64gb micro SD card costs about $19. on Amazon.

Great thanks for the info I have a few 64gb cards from my gopro that should do it.. Just need my mavic now..