Purpose of card reader

Card readers are also widely used in mobile data storage. In the early years, when using computers, common software could be copied as long as a few floppy disks. DOS systems only need to be done in one floppy disk, and a floppy disk for those small games can hold several. As a standard driving device, floppy drives can basically meet the storage needs of people's work and study. Later, with the development of computer technology, especially the introduction of Windows operating system, the volume of software increased geometrically. The poor capacity of the standard 1.44M floppy disk for these behemoths was like a drop in the bucket. The desire for large capacity storage has led to the increasing popularity of "large capacity" memory such as hard disk drives, optical drives and various compressed storage devices. Not only that, people accustomed to mobile office prefer to have portable "portable" devices with large data reserves. Therefore, there are more and more kinds of external storage devices, such as zip at first, and then external hard disk. However, their size is not small enough, and it is still inconvenient to carry them with you.

Now popular U-disks, such as Longco USB disk, luwenyi disk and patriot Mini king, integrate USB controller with flash memory chip, which is very compact and convenient for large-capacity data transmission. However, the price of such products is relatively high, and the price you pay for it is not cheap. If the combination of a card reader and a memory card is used, it can also provide the same effect as a U-disk. Memory cards mainly include CF card and SM card, which all use flash memory chips and are even widely used in MP3 players, digital cameras, PDAs and other devices. When the USB card reader is plugged into the memory card, it is equivalent to a mobile electronic hard disk. In this way, the light and convenient flash memory card has become our convenient mobile storage medium, and the card reader is the most convenient device for these flash memories to exchange data. Their performance is equivalent to that of U-disk, and their volume is not large. In addition, this combination has a strong scalability. The price of memory card keeps falling. If you need to increase the capacity in the future, you can directly buy a memory card, which will be much cheaper than the overall electronic hard disk with the same capacity. And if you buy digital cameras or MP3 players in the future, the memory card can be directly used on them, which protects your investment.