Overwrite of library files

Hi. quick question. I'm working on a couple different sketches and I keep being asked if I want to overwrite library files when I drop the files into the folder. Are these the same files or could this be a problem if I overwrite them?
Also I have two arduino folders, one in documents and one under program files and there are two library files in there as well. What gives?

You should have the installation folder, probably in program files and the sketchbook where your sketches are stored in a folder in documents.

The only folder that should have user installed libraries is the libraries folder in the sketchbook folder in documents. Do not put anything in any of the installation folders in program files. The libraries folders in the installation folders are for the libraries included for the "standard" Arduino boards.

If you install other boards (cores) there will be library folders in those core files for those particular boards (in the Arduino15 folder in ...\Users\Username\AppData\Local\Arduino15...)

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