C:\users\[name]\ESO Addons seems to be wrong.
Normally it will be:
C:\users\[name]\documents\Elder Scrolls Online\live\AddOns
No, there is no setting to change the addons folder ingame, or anywhere else.
https://www.esoui.com/forums/faq.php..._howto_install
Use the official forum search, or search in this forum here, for "OneDrive" as well.
If you use Microsoft OneDrive and have moved the documents folder to it, ESO won't find it anymore.
Also you could just login to the game, make a screenshot via the keybind and check the uipper right corner of the screen: The folder where the screenshot is stored is mentioned, and 1 folder above (Parent folder) is the one where the "AddOns" folder should be.
You can also search for AddOnSettings.txt or UserSettings.txt with the windows file explorer and the file with the latest update date and time should be the folder where the AddOns folder is located for the game.
And all this info was posted here on the forum, recently just similar yesterday, in several threads.
Please use the forum search to get additionmal info, check the "Help" button at the top (forum's main menu) and check the sticky threads in the AddOn related forum subforums. Thank you and good luck