Slow sd card

Having a mess about with the MP2 and i noticed it came up with slow sd card and something about 4k

The sd card is
SanDisk Ultra 128GB microSDXC Memory Card + SD Adapter with A1 App Performance up to 100MB/s, Class 10, U1.

I only use scandisk in my cameras and so on and never had this prob.

Anyone else come across this.

Oh forgot to add, there’s a port on the controller for sd card too, so do i use it in drone or controller

Thanks
Mick :pleading_face: