Advantages
U disk
The biggest advantages are: compact and easy to carry, large storage capacity, cheap price, and reliable performance. 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 (1GB is no longer available because the capacity is too small). In addition, there are 128G, 256G, 512G, 1T, etc. In terms of price, taking the most common 8GB as an example, you can buy it for about 20-40 yuan, and 16G for about 50 yuan. 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 various locations where personal data needs to be carried and 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. As of 2012, 4G capacity U disks are basically on the verge of being eliminated, and the capacity of mainstream U disks has developed to 8-16G, which is equivalent to the capacity of 2-4 DVD discs. The maximum capacity has reached 1T, which is equivalent to the capacity of more than 240 DVD discs.
Flash drives use the USB mass storage device category, which means that most modern operating systems can read and write to flash drives without the need to install additional drivers. Flash drives appear as block-like logical units in the operating system, hiding the complex details required for the internal flash memory. The operating system can use any file system or block addressing method. You can also make a bootable USB flash drive to boot the computer.
Similar to other flash memory devices, flash disks also have limits on the total number of reads and writes. Mid-range flash drives can be read and written hundreds of thousands of times under normal use, but as the flash drive gets older, writing becomes more time-consuming. This must be considered when we use a flash drive to run applications or operating systems. Some program developers have written special versions of operating systems (such as Linux) or applications (such as Mozilla Firefox) for flash drives specifically to address this feature and capacity limitations. They are usually optimized for use of space and store the scratch disk in the computer's main memory rather than on a flash drive.
Many flash drives support write protection mechanisms. This switch on the case prevents the computer from writing or modifying data on the disk. Write protection prevents computer virus files from being written to the flash drive to prevent the spread of the virus. Flash disks without write protection function have become a way for various viruses to spread with functions such as auto-run.
Flash drives are more tolerant of external impacts than mechanical disks, but they can still malfunction or lose data due to severe physical damage. Wrong USB port wiring during computer assembly may also damage the flash drive's circuitry.
U disk, the full name is USB flash disk, and its English name is "USB flash disk". ?[1]?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. ?[1]?
The name U disk originally came from a new type of storage device produced by Netac Technology, called "U disk", which is connected using a USB interface. After the U disk is connected to the USB interface of the computer, the data in the U disk can be exchanged with the computer.
Since Netac has registered patents for equipment with similar technology produced later, it can no longer be called "U disk" and is renamed the homophonic "U disk". ?[1]?Later, the name U disk became widely known because of its simplicity and ease of remembering, and it was one of the mobile storage devices. Now there are many USB flash drives on the market that support multiple ports, namely three-way USB flash drives (USB computer port, iOS Apple interface, Android interface).