What can slow down the keyboard and mouse when writing to the HDD (SSD main disk)?

Question

Iron

A year ago I installed an SSD and use it as the main drive with the OS. It costs Windows 10. And the HDD (1 Tb), divided into two volumes and used to store media files and portable software. Six months later, I began to notice that when recording to the HDD (when I upload a lot or large files, especially when the torrent is downloading to the HDD), some kind of brakes began, and specifically moving the mouse cursor in jerks, pressing the keyboard with a delay, or typing skips (at an average typing speed text, not all characters could be entered, something is lost). My keyboard and mouse are wireless. The OS itself does not seem to slow down, and the video works without brakes and the rest. The HDD itself (western digital) was checked through western digital lifeguard diagnostics, everything seems to be OK, at first I thought that maybe the disk had already fallen.
Could you tell me what could be the problem or how to find the cause?

Answer 1

Check the HDD with quiz.
See if there will be brakes when the torrent is unloaded.
See if there is a message in the torrent status (at the bottom of the program) like "disk loaded 100%"

Answer 2

Typical behavior when a disk dies.
The operating system makes a wild number of attempts to write to disk - there is no longer enough time for the keyboard.