I have the DJI RC RM 330. Only internal storage shows up in the storage list on the controller pull down menu. Photos & Videos, Music & Audio, & System. I have removed and reinstalled, restarted. Not recognized. Nothing. This is a Micro SDXC UHS 130mb/s U3 A2 V30 4K. I actually would rather install it in the drone (not controller) but I figured I must format it first in the controller. Is that wrong? Remarkably, I have not located any information on how to step by step install and use an sd card in this drone. Only how to install it (as if that's a mystery.) Side note: The sd card gets jammed in the drone slot. After depressing to eject, it gets lodged deep in slot. Had to literally pluck and gently bang the surrounding housing until it "popped" out.