Does it matter if the computer is turned off and the USB flash drive is not unplugged?

It doesn't matter if the computer is turned off and the USB flash drive is not unplugged. U disk is the abbreviation of USB(universalserialbus) disk, which is also called "USB flash drive" according to homonym. U disk is a kind of flash memory, so it is sometimes called flash disk. The biggest difference between U disk and hard disk is that it does not need physical drive, plug and play, and its storage capacity far exceeds that of floppy disk, so it is very convenient to carry.

Method of selecting u disk

Capacity size

Capacity is the most important factor to consider when buying USB flash drives, and it is also the biggest advantage of USB flash drives: small and portable, with large capacity. Generally, USB flash drives have capacities of 2G, 4G, 8G, 16G, 32G and 64G. Besides these, there are large-capacity USB flash drives such as 128G, 256G, 5 12G and1t.

Main points of purchase

Capacity is mainly selected according to your own needs. Most students choose 16G and 32G USB flash drives to store learning materials. Ordinary office workers will choose 64G and 128G USB flash drives to store work data. But for some designers, photographers and people engaged in computer programming, you need to use 5 12G and 1T high-capacity USB flash drives.

Functional characteristics

The main function of USB flash drive is to store data, which is only needed by most ordinary users. But in fact, USB flash drive has many other functions, such as encrypting USB flash drive, starting USB flash drive, antivirus USB flash drive and so on.

Main points of purchase

For some high-end business people, data is a secret that cannot be revealed. Usually, they need to use an encrypted USB flash drive to store data. There are also some professionals who are engaged in computers, and they need to use USB flash drives specially used for system startup or functional USB flash drives for computer maintenance.

transmission speed

Nowadays, the single storage size and volume of photos, videos and other data are getting larger and larger, which requires not only a large capacity of U disk, but also a fast transmission speed of U disk. Now USB2.0 and USB3.0 are widely used as USB interfaces. Theoretically, the maximum transmission bandwidth of USB2.0 is 480Mbps, while that of USB3.0 is as high as 5.0Gbps.

Main points of purchase

Because the transmission speed of USB3.0 is much faster than that of USB2.0, the price is relatively expensive, so you can choose according to your own needs when you buy it. For students, the interface of USB2.0 is basically enough. But for photographers who transmit a large amount of data, they can choose USB3.0 or even USB3. 1.

Matters needing attention in using USB flash drive

Do not edit directly.

The main function of USB flash drive is to store and dump files, so it is not recommended to edit files directly in USB flash drive, such as opening files directly in USB flash drive for editing, or opening video files directly in USB flash drive for viewing, because once the connection is unstable, USB flash drive exits or crashes unexpectedly, the edited files may be lost at any time, which is uncontrollable. It is best to edit it in the computer and then transfer it to the USB flash drive.

Need to leave safely

Although directly unplugging 80% of the USB flash drive will not have much impact on the USB flash drive and the files in the disk, if you are unlucky, the files in the USB flash drive may be damaged and lost, which is not worth the loss. So just in case, you still need to perform a safe exit operation before pulling out the USB flash drive. The method is simple. Right-click the USB flash drive icon in the taskbar, and then click Safe Exit, so as to ensure foolproof.

Pay attention to pull it out.

Usually there is an indicator light on the USB flash drive. If it is flashing, even if the file transfer has been completed, it is not recommended to pull out the USB flash drive directly. Because the flashing indicator light of the U disk usually means that it is working, if the U disk is pulled out at this time, it is easy to lose data and cause unnecessary losses. In addition, it is not recommended to plug in the USB flash drive when the computer is turned on and off. At this time, strong current may have different effects on the U disk.