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Definition: internal hard drive

The internal storage in desktop computers is a magnetic disk drive, and increasingly, a solid state drive (SSD). Hard drives are mostly SATA drives. See SATA, SSD, internal drive and magnetic disk.

Three-Trillion Bytes of Storage
This 3TB internal hard drive was on sale at Micro Center in the summer of 2014. A good price because eight years later, 3TB drives were selling for as much as $120 on Amazon. (Image courtesy of Micro Cener, www.microcenter.com)