store vs fixed storage

store and fixed storage both are nouns.

Word	Noun	Adjective	Verb	Adverb
store	Yes	No	Yes	No
fixed storage	Yes	No	No	No

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

store: an electronic memory device
fixed storage: (computer science) memory whose contents can be accessed and read but cannot be changed

store (noun)	fixed storage (noun)
a mercantile establishment for the retail sale of goods or services	(computer science) memory whose contents can be accessed and read but cannot be changed
a depository for goods
an electronic memory device
a supply of something available for future use

store (verb)	fixed storage (verb)
keep or lay aside for future use
find a place for and put away for storage