I haven't had any problem with the ultra plus 64 gb model. It seems to be almost as fast as internal storage. Just took a picture in raw and it took about 2.5 seconds.
Ultra Plus has the same speed as Ultra but with larger memory?
If yes how come my 16gb Ultra needs 8 seconds to save a RAW photo?
I still can't decide between:
-Samsung Pro 32GB
-Sandisk Ultra or Samsung Evo 64GB (I think Sammy is faster)
-Sandisk Extreme 32GB (about 4 to 5x faster than Ultra no?)
I am a little low on the budget as I need to buy a Quick charger for the car and for the house as well as cover!
And I am without a job now
so if anyone tried one of these cards on M9 please report your results
Edit: I tested my Ultra using A1 SD app and it score only 4mb/s!!!!
Looks like this card is bad