Oso
Premium Pilot
The 4k on a P3 is 60Mb/s which is 7.5MB/s. The P3 writes 4k at 7.5MB/s which is 4x slower than your 30MB/s card.this makes no sense, I had an old SD card I once tried, tried writing 4k to it using the Phantom. Speed tests show write and read speeds @ 20mb/s ,from what you're saying, the most it can write is 15mb/s, 4k video seems to write much faster then that
It has also been shown in tests that the P3 writes some bracketed multiple exposure still photos at a max of ~12MB/s in RAW. That's 2.5x slower than your 30MB/s card.
Hence my post that your 30MB/s card is already more than 2x faster than the P3 is capable of writing to a card.
Does that make sense?
Many people think that super fast write speed cards are a must have for the P3 but its simply not true. In fact, for 4k video and single shot jpg still photos, any class 10 card should work.
As for card densities, my personal choice is to use one lower density card per battery. Its usually a 16GB or 32GB card. I swap out the card when I put in a fresh battery. I would personally never risk losing a lot of work by sending up my phantoms over and over with a single larger density card (64GB or more) chock full of video and/or photos. Of course, everyone has their own level of comfort with risk so others may have no fear of sending up a large density card.
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