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unformatted

[uhn-fawr-mat-id]
adjective
  1. Computers. 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.
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Origin of unformatted

un-1 + formatted
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018