Slow speed on flash drive, why?

Question

Memory cards

MicroSD
size 32 GB
FAT32
Cluster size What is it? I inserted 16 kb for you, I also reformatted 64 kb.
THE SAME PROBLEM write speed 768 kb read 1 mb. Because of such a slow phone camera, even 640x480 flickers (not a word about HD). HOW TO INCREASE THE WRITE SPEED AT LEAST DOUBLE 1536-KB?
Ps To increase the speed, I did exFAT, the phone does not give out, the speed is the same.

Answer 1

Buy a normal card in a normal store, not a piece of dried feces on Ali.

Answer 2

Not all microSD cards are the same. There is a concept of speed class. They have it written in a circle on the case:
class(4)
for example.
Throw away this card. She doesn't suit you. And buy a higher class.
In the topic - they write correctly. No need to be greedy. Buy a normal product and not at the price of garbage.