It is a miniature high-capacity mobile storage product that uses a USB interface and does not require a physical drive. It is connected to the computer through the USB interface to achieve plug-and-play.
The composition of the U disk is very simple, mainly composed of shell + movement, including:
1. Movement: the movement includes a PCB + USB main control chip + crystal oscillator + sticker Chip resistors, capacitors + USB interface + SMD LED (not all U disks have it) + FLASH (flash memory) chip;
2. Shell: classified by material, including ABS plastic, bamboo wood, metal , leather cases, silicone, PVC software, etc.; classified by style, there are card, pen, mini, cartoon, business, simulation, etc.; classified by function, there are encryption, anti-virus, waterproof, smart, etc.
Extended information
Advantages of U disk:
Small and easy to carry, large storage capacity, cheap and reliable. A USB flash drive is very small, only about the size of a thumb, and extremely light in weight, generally around 15 grams. It is particularly suitable for carrying around. We can hang it on our chest, hang it on a keychain, or even put it in our wallet.
General U disk capacities include 2G, 4G, 8G, 16G, 32G, 64G, in addition to 128G, 256G, 512G, 1T, etc. There is no mechanical device in the flash drive and it has extremely strong shock resistance. In addition, the flash drive is also moisture-proof, anti-magnetic, and resistant to high and low temperatures, making it very safe and reliable.
Flash drives are virtually impervious to water or dust, and will not be scratched, which were serious problems with older portable storage devices (such as compact discs and floppy disks). The solid-state storage design used in flash drives makes them resistant to inadvertent external impacts.
These advantages make flash drives ideal for carrying personal data or work files from one place to another, such as from home to school or the office, or generally to other places. Various Locations from which Personal Data is Accessed.
Since USB is almost ubiquitous in today's personal computers, flash drives can be used everywhere. However, the small size of flash drives also means that they are often misplaced, forgotten or lost.
Although the flash drive is small, it has a relatively large storage capacity. Early flash disks had a small capacity and could only store 16-32M files. Even so, they were equivalent to 10-20 times the capacity of floppy disks that were common rewritable removable storage media at the time. With the development of technology, the capacity of USB flash drives has also increased rapidly according to Moore's Law.
Baidu Encyclopedia-U Disk