Copying files from the PC to micro sd takes extremely long because it always interrupts why is it?

Cl
1

I've been trying for days to copy files to a micro sd.

Everything started when my phone after an update to android 9 said that the micro sd would have to be formatted so I backed up everything from the sd on the PC (that went fast) and formatted the card in the phone. Then I wanted to copy the data back to the sd and that really takes days. I was after the second day at 50% and then stopped and formatted again. Now I do it individually with each folder because I think that's better. But it still takes an extremely long time. And as you can see in the video on YouTube, it always transmits only briefly and then always stays for a while at 0 kbit / s. Why is that?

The micro sd is from sandisk with 128gb memory and the files occupy a total of 32gb. The laptop is quite new with i7 7th generation and 12gb ram. What could be the problem?

El

It is faster if you take the sd card out of the bandy and extra connects and why it takes so long is because the sd card is used so to speak of 2 systems 1handy sys 1 Windows and thus overloaded