"Best" microSD card for the Lumia 950 XL

I've only had my Lumia 950 XL for about 10 days but I'm using the SanDisk Ultra 200GB Micro SD, it was a gift when purchasing my LG V10, haven't had any issues with it so far,
 
What are the real world maximum write and read speeds of the card reader in the Lumia 950's? Have anyone measured?

I just measured the speed of the internal storage, 37 MB / s read and 65 MB / s write when copying a 1.5 GB file.
It doesn't make sense to me, I thought read speed would be the faster one.
 
Just saw on Patriots own forums that their class 10 cards don't work on Android or Windows phones. If one fails, they will exchange for a class 4. Goodie gum drops. Dammit guys! Is there a stinking list of compatible cards or specs for the cards?
 
I would bet yes since 2tb is the current limit. Possibly more. But mine does not read any larger extwrnal storage beyond 2tb hdd
 

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