Storage is similar to memory in that both are used to retain information. Storagedevices use
magnetic or optical means to retain data where memory uses an electronic
circuit.
They are non-volatile, which means they do not lose the information they contain when they are powered off. They have greater capacity but are much slower than memory devices.
Floppy Disks, Hard Disks and Tapes all store information magnetically. CDs and DVDs retain information optically. Storage is used to retain important information like programs (software) and data files.