Local Copy Folders

When an add-in is added manually there is a prompt asking if you want to copy the add-in to your local add-ins folder.

Excel 365 - C:\Users\"user name"\App Data\Roaming\Microsoft\Addins\ 
Excel 2021 - C:\Users\"user name"\App Data\Roaming\Microsoft\Addins\ 
Excel 2019 - C:\Users\"user name"\App Data\Roaming\Microsoft\Addins\ 
Excel 2016 - C:\Users\"user name"\App Data\Roaming\Microsoft\Addins\