Last friday I bought my first real droine, the Mavic Ait Fly More combo.
The day afer I bought a micro Sandisk SD Card 64GB with a& write-speed of 85 MB/s.When I fly my drone, it always says the card to too slow to record 4K.

Is this correct? If so, what speed should I get to shoot 4K?

To record in 4k your sd card has to be a class 10 U3 anything less will give you that message

Did you buy from a reputable manufacturer or some odd-bod selling reputable brand cards. You can buy cards that the manufacturer rejected on quality grounds very cheaply and pass them off as the quality card?????

DJI say these are the supported cards
Supported SD Cards
Supported SD Cards
microSD
Class 10 or UHS-1 rating required
Recommended microSD Cards
16G
Sandisk Extreme
Kingston 16GB SDHC-I SDCAC/16GB
32G
Sandisk Extreme V30
Sandisk Extreme V30 A1
Sandisk Extreme V30 Pro A1
64G
Sandisk Extreme V30 A1
Sandisk Extreme Pro V30 A1
128G
Sandisk Extreme V30 A1
Sandisk Extreme Plus V30 A1

Yes, they are correct. Class 10 all the way, mon vieux!

Like I posted... I haver a Sandisk Ultra 32GB... And indeed, the Ultra is not fast enough. I should get the Extreme-version

timdelma Posted at 2018-6-3 09:03
Like I posted... I haver a Sandisk Ultra 32GB... And indeed, the Ultra is not fast enough. I should get the Extreme-version

Problem is, micro/SD card Manufacture's marketing / sales are playing fast & loose with read speeds, often implying write speeds are similar.  Along with picking data transfer sizes that give highest possible read speed (and sometimes write) speed.

I particular hate the 10x, 20x, 100x, ect. non-sense that is put on face of shell that micro/SD cards come in.

Suren Posted at 2018-6-3 08:41
To record in 4k your sd card has to be a class 10 U3 anything less will give you that message

on my Mavic pro though I' m pretty sure I'm using a class 1 sd card and the machine will still let me record in 4k does this just mean its been downressed?

Just another drone guy Posted at 2018-6-3 10:06
on my Mavic pro though I' m pretty sure I'm using a class 1 sd card and the machine will still let me record in 4k does this just mean its been downressed?

That's the strange thing... I can record in 4K witrh the card and when I look at the video, I see no issues...

Maybe it's not a real Sandisk card? Beware: Amazon Still Sells Counterfeit Memory Cards

Good day. Congratulations on your new Mavic Air. You need to have a Class 10 SD card so that the transmission of data will be fast. I will be sending you the list of SD cards for reference.

SUPPORTED SD CARDS
Supported SD Cards        microSD
Class 10 or UHS-1 rating required
Recommended microSD Cards        16G
Sandisk Extreme
Kingston 16GB SDHC-I SDCAC/16GB
32G
Sandisk Extreme V30
Sandisk Extreme V30 A1
Sandisk Extreme V30 Pro A1
64G
Sandisk Extreme V30 A1
Sandisk Extreme Pro V30 A1
128G
Sandisk Extreme V30 A1
Sandisk Extreme Plus V30 A1

Thank you.

DJI Stephen Posted at 2018-6-4 08:05
Good day. Congratulations on your new Mavic Air. You need to have a Class 10 SD card so that the transmission of data will be fast. I will be sending you the list of SD cards for reference.

SUPPORTED SD CARDS

Thanks for the reply. Replaced my Ultra-card with an Ultimate-card and now all is OK

Btw, I just LOVE my Mavic Air...

Hello everyone.
Regarding the topic, I have just bought a SanDisk Extreme microSD Card 128GB U3 A2 V30, exactly the one that is selling in the website of DJI store with the Mavic Mini 2, and I had the same Error of SD card too slow! Then the recording stops.
I also did formatting with the DJI fly app, and I tried again, but it is still the same. IS there any tricks for this or something that I can do?
Thank you in advance  

I have the same issue so going to buy Sandisk one now, what one should I buy out of these 2 , any help would be appreciated

SanDisk Extreme 128 GB microSDXC Memory Card + SD Adapter with A2 App Performance + Rescue Pro Deluxe, Up to 160 MB/s, Class 10, UHS-I, U3, V30 , Red/Gold


SanDisk Extreme 70MBs SDXC Memory Card - 128GB uHS 1 card V30

For what it is worth my SanDisk Extreme PRO 256GB U3 A2 works great. Never had a problem.

Samsung created mind blowing SSD for fastest data Read/Write.which help your DJI to transfer Large data in less time.  960 Pro 970 Pro/ 980 Pro are one of them both are incredible. You may have a lookon them if you like!!!

you have to use card above 100Mb/s