Where does Arduino IDE put the libraries these days?

Projects Programming
1

I have a duplicate SPI library. One is in C:\Program Files (x86)\Arduino\libraries where I put a copy of it from my zip file.

But the duplicate is not in C:\Users\Greg\Documents\Arduino\libraries or in C:\Users\Greg\AppData\Local\Arduino15.

So where is it?

2

SPI is architecture specific. Look under C:\Program Files (x86)\Arduino\hardware\arduino\avr\libraries and/or C:\Users\Greg\AppData\Local\Arduino15\packages\arduino\hardware\avr\1.6.14\libraries