Hello, I'm think of getting a Dji Phantom 4, and was thinking about the 16GB Micro SD Card. Is it possible to save the content on the micro sd card onto the iPadand wipe/delete the micro sd card on the iPad. Would I still retain the 4K video? How much 4K and 1080 footage can you get on a 16GB micro SD card? Thanks What type of bag do you use for your phantom? Are ND Filters really needed?