What does "secondary storage" mean?

The nonvolatile memory of a computer, not directly accessible by the central processing unit.

What is a synonym for "secondary storage"?

Common synonyms include: auxiliary storage, external storage.

noun

noun ·Rare ·Advanced level

Noun

1
The nonvolatile memory of a computer, not directly accessible by the central processing unit. uncountable
2
a data storage device that is not the main memory of a computer wordnet