storage vs storage device

storage and storage device both are nouns.

Word	Noun	Adjective	Verb	Adverb
storage	Yes	No	No	No
storage device	Yes	No	No	No

As nouns, storage device is a hypernym of storage; that is, storage device is a word with a broader meaning than storage:

Other hypernyms of storage include computer hardware, hardware, memory device.

storage (noun)	storage device (noun)
the commercial enterprise of storing goods and materials	a device that preserves information for retrieval
the act of storing something
depositing in a warehouse
a depository for goods
an electronic memory device
(computer science) the process of storing information in a computer memory or on a magnetic tape or disk