1000 gigabytes. To give you an idea of how much a terabyte holds. Using a 6-megapixel camera at high resolution, a terabyte will hold about 285,700 digital photos. Based on 4 minutes per song and a 128 kbps bit rate, it will hold about 250,000 songs in MP3 format. A terabyte will hold about 440 hours of DVD quality video, and up to 120 hours of HD video.