If your cousin asks you what devices can be used to record and retrieve data, instructions, and/or information for future use on a computer, which of the following would you tell her?

Here are the following objects that I could answer to my cousin:

USB pen drives/Flash Drives - they can be portable and can be used on different devices
Hard disks - they are the most reliable option on a personal computer.
Solid State Drives - they are much faster than hard disks, although much more expensive

Hope this helps you.