You can access the top level add-ons folder by going to the Tools>Add-ons menu item in the main Anki window. Click on the View Files button, and a folder will pop up. If you had no add-ons installed, the top level add-ons folder will be shown. If you had an add-on selected, the add-on’s module folder will be shown, and you will need to go up one level.
The add-ons folder is named "addons21", corresponding to Anki 2.1. If you have an "addons" folder, it is because you have previously used Anki 2.0.x.
Each add-on uses one folder inside the add-on folder. Anki looks for a
__init__.py file inside the folder, eg:
__init__.py does not exist, Anki will ignore the folder.
When choosing a folder name, it is recommended to stick to a-z and 0-9 characters to avoid problems with Python’s module system.
While you can use whatever folder name you wish for folders you create yourself, when you download an add-on from AnkiWeb, Anki will use the item’s ID as the folder name, such as:
Anki will also place a meta.json file in the folder, which keeps track of the original add-on name, when it was downloaded, and whether it’s enabled or not.
You should not store user data in the add-on folder, as it’s deleted when the user upgrades an add-on.
If you followed the steps in the editor setup section, you can either copy your myaddon folder into Anki’s add-on folder to test it, or on Mac or Linux, create a symlink from the folder’s original location into your add-ons folder.