Network folder slows down on a Windows 10 PC, what are the reasons?

Question

Windows

Good afternoon!

There is a PC, it has network folders. When copying files from a folder, the process is very slow. When sending to a folder, the speed is normal. What could be the reason? By the way, there is a Wi Fi USB antenna, a form factor without an antenna in the USB 3.0 port, the speed declared by the manufacturer is 200 Mbps at 2.4 G. Could the Wi Fi antenna be the cause?

Answer 1

Network folder slows down on a Windows 10 PC, what are the reasons?

The answer is in the question.
WiFi either. What is incomprehensible here.

By the way, there is a Wi Fi USB antenna, a form factor without an antenna in the USB 3.0 port

The statement is very profound. I read it several times, but I didn't understand the meaning.

speed declared by the manufacturer 200 Mbps for 2.4 G

The manufacturer claims the maximum possible speed under ideal conditions.
Here, at my Toyota, the manufacturer claims a speed of 160 km / h, but for some reason it does not go to the store faster than 30 km / h. So it could be dispersed, but there are a lot of other cars on the road that interfere with this. Under ideal conditions, the road is clean and everything is at your disposal. In real conditions, you have to somehow drive through these traffic jams.
Well, calculate yourself 200 megabits - the maximum speed of the channel, service data and your traffic are transmitted over the channel, the share of service data is 40-60%. As a result, the maximum possible data transfer rate is 80 megabits / s, or 10 megabytes / s.
But this is in the ideal case, but in reality, when there are a bunch of WiFI devices on the air, you will get 1-30% - a hundred kilobytes / s or several megabytes / s.
Of course, this is very slow.
Therefore, of course, WiFi is the reason.
Use twisted pair and a gigabit switch, or at the very least, you can use WiFi 5GHz