Why is Permission denied when transferring an image to a flash drive using dd?

Question

linux

There is a backup flash drive image test.img.
I want to transfer it to another flash drive (which is currently bootable with Lubuntu, if that matters).
I execute the command

sudo dd if=/home/юзер/test.img | pv | dd of=/dev/sdb

Throws an error:
dd: failed to open '/dev/sdb': Permission denied

Answer 1

dd if=/home/юзер/test.img | pv | sudo dd of=/dev/sdb

You start reading from sudo, but you need to write.
That's better
pv /home/юзер/test.img | sudo dd of=/dev/sdb