Dear Sir,
I'm trying to use the 8MHz bootloader, but I kindly ask you in detail where I've to copy the files extracted from the zip file breadboard-1-6-x.zip.

Actually I'm using an Arduino IDE 1.8.10, the sentence that I need some explanation/confirmation is the following one:

"Open your Arduino folder path and move the breadboard folder from the zip archive to the "hardware" folder of your Arduino sketchbook."

is the Arduino sketchbook folder located at the path listed from:

File=>Preferences=>Settings

at the text field with label "Sketchbook location"?

At this path I've no other "hardware" directory, just only a libraries folder, so if this is the right path I've just to simply copy and paste the "breadboard" folder into this one, I'm correct?

Thanks!
Fire