Yes, STORAGES is a Scrabble word!

Letter values in Scrabble US: S 1, T 1, O 1, R 1, A 1, G 2, E 1, S 1.

Is it a valid word?

STORAGES is a valid word in the official Scrabble dictionary (US), the UK Scrabble Dictionary and Words with Friends (ENABLE).

the act of storing something
a depository for goods
the commercial enterprise of storing goods and materials
(computer science) the process of storing information in a computer memory or on a magnetic tape or disk
an electronic memory device
depositing in a warehouse

Also: computer memory, computer storage, memory board.