Again: READ before you ink.
Try the first link and then read. It's all described there, with details and 3 ways to find the "correct folder" for your addons.
Hint: It's NOT your ESO game's or client folder.
btw: If you are not using Windows as your operating system you might need to tell us this in advance. Not sure if this is a unix system you are using on your screenshot or Windows 7/8/10 theme.
https://wiki.esoui.com/UserFolder