auxiliary storage vs secondary storage

auxiliary storage and secondary storage both are nouns.

Word	Noun	Adjective	Verb	Adverb
auxiliary storage	Yes	No	No	No
secondary storage	Yes	No	No	No

As nouns, auxiliary storage and secondary storage are synonyms defined as:

auxiliary storage and secondary storage: a data storage device that is not the main memory of a computer

Other synonyms of auxiliary storage include external storage.

auxiliary storage (noun)	secondary storage (noun)
a data storage device that is not the main memory of a computer	a data storage device that is not the main memory of a computer