U disk was invented by China Netac Technology. In the 1990s, many companies claimed that they were the first to invent USB flash drives. However, only China Netac Company really obtained the basic invention patent of U disk. This patent fills the gap of invention patents in the field of computer storage in China in the past 20 years, and also shocked the whole storage industry. Israel filed an invalid reexamination with the Chinese Intellectual Property Office, which once triggered a patent dispute between China and foreign countries. From June 5438 to February 7, 2004, Netac finally obtained the basic invention patent of flash disk officially authorized by the US Patent Office, which finally ended the competition.
There are many kinds of USB interfaces. Strictly speaking, only USB flash drives with USB interfaces can be called USB flash drives. This means that most modern operating systems can read and write flash drives without installing additional drivers.
U disk is displayed as a block logic unit in the operating system, which hides the complex details needed by internal flash memory. The operating system can use any file system or block addressing.
You can also make a boot USB flash drive to start the computer. Now Linux, MacOSX, Unix, Windows2000, XP, win7 and other operating systems have built-in support.