I bought a Lexar Professional 128 GB microSDXC 1000X super speed USB 3.0 and my Phantom 4 Pro + won't recognise it as valid. Does anyone have any advice in this regard?

There have been lots of reports of trouble with that card in the P4 pro.
But going for the biggest, fastest and most expensive card won't do much for you.
The speed bottleneck is the speed the camera records data at.
Get a faster card and you get no additional benefit from it in the Phantom.

btw ... If you value your work, you would use smaller cards and not put your work at risk every time you send it out flying again.

Labroides Posted at 2018-1-12 18:34
There have been lots of reports of trouble with that card in the P4 pro.
But going for the biggest, fastest and most expensive card won't do much for you.
The speed bottleneck is the speed the camera records data at.

Thank you. I am a novice and I got advice that a faster card is desirable. I guess I'm out $400 CAN ... I bought two

Ecoguy Posted at 2018-1-12 19:04
Thank you. I am a novice and I got advice that a faster card is desirable. I guess I'm out $400 CAN ... I bought two

The best advice is to buy a Sandisk Extreme series card, they work every time, Lexar have been a problem for some time now.

Hi there, here is a supported SD card list for your reference only. For more details, please visit: https://www.dji.com/phantom-4-pro/info#faq

I use the Sandisk Extreme 64 GB cards and have never had an issue with them in my Inspire's Phantom's and Nikon's

I used samsung evo plus 128gb 90mb write and 100mb transfer. Cheap and still good

SanDisk extreme 128gb also can

I currently use the Sandisk Extreme 64 GB card and has plenty of space,