I know; this has been asked before but time for an update!
What is todays brand and size choice for the sd card and a brief explanation as to why your pick?

I've used the 64 gb SanDisk Extreme PLUS microSDXC UHS-I class U3 memory card, which has the capacity to hold hundreds of photos, 4K Ultra HD and videos which I've used for Go Pro and DJI products. Uploads quickly too.

for reference:

As M.C.Pilot says, the Sandisk Extreme series cards are the best. Others may look good, but in the long term, Sandisk are most reliable coupled with high performance. Just watch out for counterfeit versions of them, only buy from trusted sources, and that does not mean Amazon.

Except 64 gb SanDisk Extreme PLUS microSDXC UHS-I class U3. As a bigger RAM of SD card, samsung pro 128G UHS-3 is also in the recommended list.

OK; SanDisk it is!  64GB is the right size for my needs.  
Thanks!   

DJI Elektra Posted at 2017-10-26 01:06
Except 64 gb SanDisk Extreme PLUS microSDXC UHS-I class U3. As a bigger RAM of SD card, samsung pro 128G UHS-3 is also in the recommended list.

"As a bigger RAM of SD card, samsung pro 128G"
How come when P4 Faq specify up to 64GB?
Cite: "Phantom 4 comes with a 16GB SD card. SD cards up to 64GB, Class 10 or UHS-1 rating are compatible. "

KedDK Posted at 2017-10-27 19:33
"As a bigger RAM of SD card, samsung pro 128G"
How come when P4 Faq specify up to 64GB?
Cite: "Phantom 4 comes with a 16GB SD card. SD cards up to 64GB, Class 10 or UHS-1 rating are compatible. "

Sorry that I didn't ask the model of the drone. P4P can support 128G while P4 is 64G.

DJI Elektra Posted at 2017-10-27 20:16
Sorry that I didn't ask the model of the drone. P4P can support 128G while P4 is 64G.

"Sorry that I didn't ask the model of the drone."
Shouldn't have to, this thread is posted in P4 forum as it is easy to see .... aaargh ya nowhere. :-)