not converted to the required arrangement of data for use with a particular system
Boot the unformatted hard disk.
Choose Paste Special, selecting Unformatted Text and OK.
unformatted in American English
(unˈfɔrmætɪd)
adjective
Computing
pertaining to a disk that has not been electronically prepared to receive files or other text; blank
You cannot save files on an unformatted disk
Word origin
[un-1 + formatted]un- is a prefix meaning “not,” freely used as an English formative, giving negative oropposite force in adjectives and their derivative adverbs and nouns (unfair; unfairly; unfairness; unfelt; unseen; unfitting; unformed; unheard-of; un-get-at-able), and less freely used in certain other nouns (unrest; unemployment)