[ANSWERED] Storage from terminated instance not added to existing instances

I explored the AWS Docs and realized:

1. The storage isn't added (aka attached) automatically!
2. If you have already terminated your EC2 instance, like I had, you need to create a new EC2 instance, then detach the storage from this newly created instance and attach it to your existing instance and finally mount it.

Deepest appreciation for the thorough and detailed official documentation of AWS.