It is a slowish card though. "Up to 60MB/sec speed for fast transfer rates"
If you want speed (for recording 4k videos and shooting pictures in raw and such) you are going to need 80MB/s or more.
I got this: Samsung PRO Class 10 Micro SDXC http://www.amazon.com/Samsung-Class-Adapter-MB-MG64EA-AM/dp/B014W1ZQ42/ref=sr_1_1?ie=UTF8&qid=1459802473&sr=8-1&keywords=samsung+pro+%2B+sd
this is the one I bought yesterday. Faster speeds, about on par on the fastest read/white speed of the phone.