Auxiliary Storage

This is any memory that isn't the boot drive or the RAM. This is therefore any additional storage beyond boot space. Any hard drive in the computer, any SD card in a phone or a camera, any USB in a laptop, anything with magnetic discs or magnetic tape; all of these are types of Auxiliary Storage.

Auxiliary memory is used to store everything on a computer, any information that a program needs to store, any music, pictures or videos that you want to store. All of it is stored on a Storage Device.