Storage is the at least semi-permanant holding of an amount of something. A storage device is an apparatus for holding things.
There are several different types of storage:
... Kommissariat Gosudarstvennoi Bezopastnosti[?] (NKVD, 1934-1943) Ministerstvo Gosudarstvennoi Bezopastnosti[?] (MGB, 1946-1954) Komitet Gosudarstvennoi Bezopasnosti ...