Change/update the default user profile photo/thumbnail folder location I'm having a hell of a time tracking where i can change/update the default user profile photo/thumbnail folder location. I keep reading and have tested that you can create a new volume for assets. My interest is is being able to locate and change the default folder location. Any advice?
In Craft 3 the place that users photos get stored in are proper Asset Volumes, meaning they can be stored in a folder on the local file system, or on S3, Google Cloud, or any other place that a plugin provides a Volume for.

Once you create a Volume for user photos, go to Settings->Users->Settings in the Control Panel and you can choose that Volume under the "User Photo Volume" settings.