1. Tape -  magnetic tape on which sound can be recorded. 

2. CD (Compact Disc) -  a pedic or record circular storing, and playing back audio, video, and computer data. 

3. USB Drive ( Universal Serial Bus ) - an external flash drive, small enough to carry on a key ring, that can be used with any computer that has a USB Port.

4. Memory Card (aka Flash Memory Card or Storage Card) - is a small storage medium used to store data such as text, pictures, audio, and video, for use on small, portable, or remote computing devices.

5. Computer Hard Drive - secondary storage devices for storing audio files.

6. Internet/Cloud - websites or file repositories for retrieving audio files, and more precisely the files are stored in some datacenter full of servers that are connected to the Internet.