Mentioned U disk, I believe we all know it, it is small and easy to carry, many students will buy a U disk to store their own commonly used information. Therefore, U disk market is also very hot, up to Tmall Jingdong, down to the roadside stalls are all kinds of U disk, for friends who want to buy U disk, it is inevitable that some dazzling. The following author's science knowledge about U disk related knowledge to prevent everyone from being deceived.
The market is flooded with a lot of poor U disk
Let us first understand the composition of U disk. U disk and SSD structure are basically similar, are composed of main control, PCB, flash memory, but the volume is different. However, compared with flash memory particles in SSDs, flash disks on U disk are mostly of poor quality and have a shorter lifetime. In general, a factory with a fab will produce a complete wafer. Although it is the same wafer, the chip quality is not the same for each part.
Therefore, a complete wafer will inevitably be cut, and some intact fine particles will be cut and packaged into high-quality SSDs. The rest of the scrap will be called black sheets. In fact, considering the quality assurance of the original factory, the granules will be declared dead and strictly defined as scrapped.
In general, the price of the original film is very high, while the black film is scrapped, the price is very low. Some illegal manufacturers recovered at extremely low prices and made black core SSDs or U-discs to continue sales.
In terms of quality, black flash memory particles are difficult to use because the original factory had already sentenced the particles to death. Only the unscrupulous manufacturers turned it out and sold it, that is to repackage it, but the quality is undoubtedly very poor. So buying U-disks of this kind of granule basically is to look at luck, good luck can use three or five months, bad bad luck will be broken in a few days.
U disk chaos: too cheap is pit
U disk seems to be very cheap, but in fact the cost is very high. Many manufacturers regularly purchase flash particles and then sell them at a price higher than the market price. It is difficult to sell them, so this also forces manufacturers to produce inferior flash drives.
U disk as a mobile storage device, its use of frequency is much lower than the SSD, many users may not use a U disk in a month, but it will turn on the computer every day. So this creates a situation: Although the U disk is of poor quality, its failure rate is much lower than that of the SSD.
Isn't it a matter of buying such a USB flash drive? Anyway, the frequency of use is low? Certainly not! The failure rate is very low in the overall U disk market, but for us personally, as long as it encounters data loss, it is 100%. I believe that most people cannot afford the consequences of losing data.
Which U disk can not buy?
Said so much, in the end what U disk can not buy it? The following author for everyone to sum up some U disk Lei Hang, we must pay attention.
1, expansion U disk
Expansion of U disk is already a very old scam, but there are still a lot of scams. Now the tricks of fraudsters are very clever. The conventional detection capacity software cannot detect the expansion of the U disk at all, and only a large amount of data can be tested. This kind of U disk utilizes the psychology of white gluttony and cheapness. As long as you understand the price of a regular 1TB U disk, you will not be deceived.
2, roadside booth U disk
This U disk is even worse, can be used fortunately, and some U disk is an empty shell with a USB interface, and you find fooled to find it back, is certainly not found. So buy U disk must go to the formal channels to buy, such as computer stores and e-commerce platform.
3, praise back to U disk
U disk itself has no profit, after the arrival of the courier business has urged you to confirm the receipt, let you give a praise, they return to you. Then you must pay attention to this U disk is not a capacity expansion disk, or else disassemble the film, the life is very poor. We must pay attention to this situation, not to lose money because of small losses, in order to return a few dollars to lose the e-commerce platform after the sale of rights protection opportunities.
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