When you sign up to YNAW, you are asked to accept the following authorizations:

Authorization scopes | Explanations |
|---|---|
See, edit, create, and delete only the specific Google Drive files you use with this app. | This scope is required to perform the following actions:
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| This scope enables you to link to other Google docs from a YNAW page. |
Yes.
The “See, edit, create, and delete only the specific Google Drive files you use with this app” authorization is not sufficient to perform all the actions required by the app.
Because of this it is required to share your wiki folder with wiki@youneedawiki.com.
This account can perform actions on behalf of the user. The account is protected with 2-factor authentication and is used to perform actions on behalf of the user.
If you have sensitive information that you do not wish to allow access, you can remove wiki@youneedawiki.com from those files/folders, but those files/folders will not be visible in the wiki.
Yes (but this can be disabled).
In order to improve search performance, document content is cached for up to 1 month.
Content is stored securely and requires the same access permissions that are configured in Drive.
This can be disabled in settings.
YNAW can move files to trash if you click to "remove" on that file, it does not delete files permanently.
Data stored
Your data is stored in a Google Firebase database. It is stored securely using Firebase's recommended security settings.