It also allows you to install a new hard drive in that machine if the current one fails or if you want to upgrade to a faster or larger capacity hard drive. IE: Xerox, Canon, Konica Minolta, Ricoh, Océ, Toshiba, Kyocera Mita, Savin, Gestetner, Lanier, Danka, Ikon, Imagistics-Pitney Bowes, Develop, Agfa, Panasonic, Rex Rotary, and MORE.
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