For U-disk manufacturers, it is marked according to the conversion unit of 1 G = 1000 M. For computers, calculate according to 1 G =1024 M. Therefore, no matter what USB flash drive you buy, the memory displayed after plugging it into your computer will always be smaller than the one indicated by the USB flash drive manufacturer. For example, a U disk with a capacity of 8G is actually only 8 * 1000 = 8000 M instead of 8 * 1024 = 8192 M. In the capacity of 8000 M, divide 8000 M by 1024 M / G (computer) = 7.8125 G = 7.8 G and then After deducting some system files, the space occupied may only be 7.5 G. First, the usb port. Although USB2.0 is still the mainstream, 3.0 has appeared on a large scale. I admire chasing the hardware version, you can’t chase it, but the technology development trend must be seen clearly. Therefore, it is not recommended to buy a USB flash drive with USB2.0 port now, the USB flash drive should be USB3.0. Second, the main control chip and crystal oscillator. Open the U disk and check the main control chip model and whether there is an independent crystal oscillator (but not cylindrical). However, you can’t open it when you buy it. Generally, choosing a regular brand is basically guaranteed. You don’t need to look at the third one, depending on the type of storage chip. Storage chips are divided into SLC, MLC, and TLC, which are worse than one in turn. But TLC can also be used. For example, the Toshiba Flash upstairs uses TLC. Although the reading and writing have achieved the same speed as my old MLC USB flash drive, the technology is developed. TLC is still not as good as SLC, and the speed is still the same. One-tenth of SLC is usually enough, but when you copy large files of G (such as movies, software installation files), it will be painful. The type of storage chip can be checked with a USB flash drive and mass-produced software after the purchase, without opening the shell. When you Taobao, just follow the USB3.0 and preferably SLC, the last MLC, not TLC standards. Choose a longer shell and a slightly larger size (so that there is space inside the USB flash drive, and the USB flash drive manufacturer can also make the circuit board, there will be a chance for fault tolerance). The USB port should not be flexible, one-piece. Traditionally, the USB port with a hat has a longer lifespan.
