memory vs real storage

memory and real storage both are nouns.

Word	Noun	Adjective	Verb	Adverb
memory	Yes	No	No	No
real storage	Yes	No	No	No

As nouns, real storage is a hyponym of memory; that is, real storage is a word with a more specific, narrower meaning than memory:

memory (noun)	real storage (noun)
an electronic memory device	the main memory in a virtual memory system
the power of retaining and recalling past experience
the cognitive processes whereby past experience is remembered
something that is remembered
the area of cognitive psychology that studies memory processes