China DOS Union

　A hard drive is one of the main storage media of a computer, consisting of one or more aluminum or glass platters. These platters are coated with ferromagnetic material. The vast majority of hard drives are fixed hard drives, permanently sealed inside the hard disk drive. Hard drive capacities keep getting larger, and we are storing more and more data on them. So which hard drive brand is good?
　　Top 7 hard drive brands (2010)

　　1 Seagate (top ten hard drive brand, founded in the USA in 1979, a global leading brand, the world's largest independent storage device manufacturer)

　　2 Hitachi (Japan, 1910, one of the world's largest comprehensive multinational groups, Hitachi Global Storage Technologies)

　　3 Western Digital WD (top ten hard drive brand, founded in the USA in 1970, a leader in the data storage industry, Western Digital Corporation)

　　4 Samsung (Fortune Global 500 company, well-known trademark in China, founded in Korea in 1938, top ten hard drive brand, Samsung Group)

　　5 Excelstor (top ten hard drive brand, one of Shenzhen's “Top 100 Export Enterprises”, high-tech enterprise, Shenzhen ExcelStor Technology Co., Ltd.)

　　6 Toshiba (Japan, 1939, one of the World's 500 Most Influential Brands, top ten hard drive brand, Toshiba (China) Co., Ltd.)

　　7 Fujitsu (Japan, 1875, leader in the IT industry, one of Japan's oldest electrical equipment manufacturers, Fujitsu)