It is said that you should not buy cheap digital products, because only by opening the "blind box" can you know what is inside. For example, someone bought a power bank that ran out of power when it couldn't charge a mobile phone. When he took it apart, it turned out that it had sand inside as a counterweight. There is also a certain brand of fast charging. The fast charging state lasts for a few seconds and then changes to slow charging. After taking it apart, I found that there was an iron block inside as a counterweight. Is this a wild way?



Of course, cheap U disks are not immune. It is not surprising to use NAND black chips or even flash firmware to make "expansion disks". The popular high-speed, high-capacity mobile solid-state drives (PSSD) have not escaped the clutches of JS. Recently, someone shared a good thing on Xiaohuangyao. He said that he bought a 512GB mobile solid-state drive, but the speed was very slow, not even close to the level of a mechanical mobile hard drive. However, after taking it apart, he found that it was really eye-opening.


From the picture above, it can be seen that this is a modified M.2 solid-state drive box. After removing the outer shell, a green PCB is stuck to the internal frame with hot melt glue. There are no common types of NVMe/SATA main control chips and M.2 slots on it, but there are two MicroSD card (also known as TF) card holders, plus an ancient TSOP packaged main control chip. What is this operation? We know that the common MicroSD card reading speed is about 100MB/s, and the writing speed is only a few dozen MB/s. Even if the two TF card slots are made into RAID0, the writing speed is more than 100 MB/s.


What's even more ironic is that JS has also "thoughtfully" equipped the PCB with a USB Type-C interface, which greatly increases the versatility. It can be used on desktops, laptops, mobile phones, and tablets. Just ask, do you agree? However, judging from the solder joints of the interface, only the USB2.0 standard wiring is welded, and coupled with the lower speed of the TF card, this is the reason why this copycat mobile solid-state drive is slow.


Of course, the most eye-catching thing is the “MADEINCHINA” label. Our wisdom is endless, but it’s okay not to use such “wisdom”. Therefore, when buying electronic products, try to buy big-name products, and it is better to avoid low-priced brand-name products that you have never heard of.

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