@PeteS2017 , there are plenty of SD cards with write speeds that can handle the
MA 100mbps (that is, real write speeds, not advertised, "claimed" speeds). SD card rule of thumb: Speed costs. Period. If the regular price of a card is substantially less than $1/GB (and not some sort of clearance sales price), then it won't be that fast, especially on write.
I use these for everything (
MA, Rylo, etc.), and they are blazingly fast. I wait for them to go on sale on Amazon for around $32, then pick up a few. They truly do read at about 132MB/s (yes, that's megaBYTES), and write about 1/3-1/2 that speed:
@Jondachi , the
MA uses wifi radio/transmission protocol whether flying with a phone alone, or with the RC. The RC gives much better range because it has a more powerful transmitter than smartphones, and dedicated antenna improving sensitivity. Still, it's wifi.
You don't need to have a wifi connection to the internet, via some Access Point, to use a smartphone to operate the
MA anywhere. The wifi connection is directly between the phone and the
MA -- there is no other "wifi" hardware involved. It will work just fine in the most remote locations of the Amazon, where the nearest internet access via wifi is hundreds of miles away.