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U disk composition Nov 06, 2018

The composition of the U disk is very simple: shell + movement + flash + packaging



    1. Movement: The movement includes a PCB board + main control + crystal + RC capacitor + USB head + LED head + FLASH (flash) chip



    2. Shell: According to the material classification, there are plastic, bamboo, metal, leather, silicone, PVC, etc.; according to the style, there are cards, pens, mini, cartoon, business, simulation, etc.; according to function classification, there is encryption, Anti-virus, waterproof, intelligent, etc.



    3. Packing: Generally, there are carton packaging, plastic box packaging and metal box packaging. Generally, most of the paper trays and iron boxes are packed. For some special shape PVC USB flash drives, sometimes special packaging is specially made.

    


    Compared to other portable storage devices (especially floppy disks), flash drives have many advantages: they do not take up space, usually operate faster (USB 1.1, 2.0, 3.0 standards), can store more data, and It may be more reliable (because there is no mechanical device), disconnected during reading and writing without damaging the hardware (the floppy disk is broken immediately after reading and writing), and only data is lost. This type of disk uses the USB mass storage device standard and has built-in support in modern operating systems such as Linux, Mac OS X, Unix and Windows 2000, XP, and Win7.



    Flash drives typically use a plastic or metal case with a small printed circuit board that allows the flash drive to be small enough to fit into a pocket like a key ring charm or stringed onto a neckline. Only the USB connector protrudes beyond the protective case and is usually covered by a small cover. Most flash drives use the standard Type-A USB connector, which allows them to be plugged directly into a USB port on a PC.



    To access the data on the flash drive, you must connect the flash drive to your computer; either directly to the computer's built-in USB controller or a USB hub. The flash drive will only boot when plugged into the USB port, and the required power is also supplied by the USB connection. However, some flash drives (especially high-speed flash drives using the USB 2.0 standard) may require more power, so if they are connected to a USB hub like a keyboard or screen, these flash drives will not work unless they are directly Plug in the controller (that is, the USB port provided by the computer itself) or a USB hub with an external power supply. Some U diskes are composed of a drive and a USB flash drive, so it is necessary to distinguish them at the end (in DOS/win32 environment).

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