HedgeTrimmer
First Officer
Netherlands
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Mullazman Posted at 2018-5-31 22:25
In addition to the above, here's an example of where the confusion lies. The UHS-I Class 1 card from Samsung happens to be able to WRITE at 20MB/s, that is ABOVE the 10MB/s requirement for the UHS-I Class 1 standard, but below the UHS-I Class 3 standard (30MB/s I believe), so it will in fact work with the Mavic Air - you don't need to "be safe" and get a Class 3, as mentioned you just need to know what you're buying will write at more than 12.5MB/s Class 3 is easy, but if you can find the write speed, as Samsung's website has helpfully listed in this case, this card will do just fine, despite being Class 1.
[view_image]
As you point out, the Write MB/s (Mega Bytes per second) is critical number.
Not that you want a card with a slow Read speed, but in almost ever case, Read speed exceeds Write speed.
There is one other Tidbit that is hidden by even a decent Write MB/s speed. Chalk it up to competition and Marketing Hype. The Write speeds vary by Block size of data written and Format of micro/SD card. Part of it is whether micro/SD card has internal buffering / Caching.
Anyway, the Highest Write speed obtained is what is generally Marketed, not lowest or even average Write speed.
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