Hi there,

As we can see P4pro supports highly anticipated 100mb/sec bitrate which is 12.5MB/sec.
Not so many UHS-I(Class10) SD cards supports this speed.
Previously I used Lexar 633x UHS-I cards whcih spec is limited to 10MB/sec writing - not enough speed.

As far as i see SanDisk extreme UHS-I (U3) is the only choise?
Any ideas?

Does DJI tested P4pro with the different SD cards and is the any list?


best regards,
Andrey

The Lexar 633x cards write faster than 10mb/s, they Write around 28mb/s. U1 ratings mean at a minimum the card must write at 10mb/s.

http://www.cameramemoryspeed.com/reviews/sd-cards/lexar-professional-633x-64gb-micro-sdxc-memory-card/

trance728- Posted at 2016-11-25 09:33
The Lexar 633x cards write faster than 10mb/s, they Write around 28mb/s. U1 ratings mean at a minimu ...

Ohh, thank you! Great to hear I can continue to use cards I have. :-)

Hold on a second trance728-, while it is true that U1 cards can write at speeds upwards of 20MBps, remember that class rating (U1, U2, Class 10, etc.) is the minimum sustained write speed. Anything above that is considered peak write speed. If you use a U1 card at a higher sustained speed, you risk damaging the card over time.

To clarify, when it comes to video recording(A form of sustained writing) you should always make sure that your class rating speed is higher than your camera's write speed.

Minimum sustained write speeds. A speed class rating means that the card has been verified to never write slower than the speed of that class.
    1. U3: Minimum 30 MB/s Write
    2. U1: Minimum 10 MB/s Write
    3. Class 10: Minimum 10 MB/s Write
    4. Class 6: Minimum 6 MB/s Write
    5. Class 4: Minimum 4 MB/s Write
    6. V6: Minimum 6 MB/s Write
    7. V10: Minimum 10 MB/s Write
    8. V30: Minimum 30 MB/s Write
    9. V90: Minimum 90 MB/s Write