This listing is for a used, tested, working 1TB HGST replacement internal hard drive for use in an Xbox One X. This hard drive form factor fits all Xbox One X Models.Note: A USB OS installation drive will be needed at the time of hard drive replacement. (This is the case for all Xbox One X models)The USB OS/Firmware installation drive is optional. instructions are included with USB installation drive purchase.The usb firmware installation drive ships in different styles.A Hitachi(HGST) or other major brand will be shipped.Hard drive will ship with a black or white label.Buyer’s choosing the “USB OS Installation Drive Only” option will receive the USB OS installation drive only. Ships within 1-2 business days unless otherwise stated in the listing.