How to detect whether it is an expanded USB disk

php editor Apple will introduce you how to detect whether it is an expanded USB flash drive. In the process of using a USB flash drive, sometimes the capacity of the USB flash drive is displayed incorrectly. This may be because the USB flash drive has been expanded or other problems have occurred. In order to confirm whether the USB flash drive has been expanded, we can check it through some simple methods. In this article, we will introduce you in detail several methods to detect whether the U disk is expanded, and help you solve the problem of incorrect U disk capacity display.

I didn’t know the result when I searched it, but I was really surprised when I found it. Entering the keyword "U disk" immediately caught my attention and saw an incredible price - less than 30 yuan, and it also had 2TB of large memory and a USB3.0 interface. It made me want to click in to learn more.

Yes, I couldn’t resist the temptation to click in and learn about it. Its high performance parameters, cost-effective price and detailed description attracted me. In addition to 2TB USB3.0, there are also 30-day trial, two-year replacement, and five-year warranty services. At least that's how it's described on the product page.

So, I was impressed and chose to place an order, spending a total of 39 yuan.

I admit that I was attracted by the cheap price, and my curiosity drove me to jump into the pit. I knew it was a trap, but I wanted to see how deep it was.

The delivery and express delivery were very fast, it only took two days to receive it. After receiving the USB flash drive, I found that it was made of real metal, and it also came with an A-port and a C-port adapter, as well as a silicone protective sleeve. This was a little surprise.

Looking at it this way, do you think it’s worth it? Next, whether there is any rollover depends on the performance of the USB flash drive.

# Mainly check two aspects, 2TB and USB3.0.

In fact, I have a psychological expectation that this USB flash drive cannot be 2TB. As for USB3.0, I still have a little hope.

Without further ado, let’s start the verification directly.

The packaging is very simple, just a small piece of plastic. There is no logo on the USB flash drive, only the words "2TB" and "USB3.0".

Plug it into the computer and you can clearly see that there is 2TB of memory. You can also check it by checking the disk properties. The general method will definitely not find the problem.

Next, I copied a 1.5GB file into it. It can be copied into it. After seeing that there was no problem, I copied a 130GB large file directly into it. This Try it, this product has not yet shown its original shape, but the speed has dropped like a cliff, to dozens of KB, and the display time is 8 hours. Could it be said that its actual memory exceeds 128GB?

There is no other way but to download the software mydisktest to directly detect whether it has been expanded. But surprisingly, when the software wanted to detect it, it was unexpectedly exited.

At first I thought it was just the software crashing accidentally, but it wasn’t until I tried no less than ten times and changed the software version midway, but it still didn’t work, that I finally realized that maybe the manufacturer had We have manipulated the USB flash drive so that the mainstream software cannot detect it. So I borrowed a brand of USB flash drive and it could detect normally the first time I plugged it in, which confirmed my idea.

Since mydisktest has been blocked by the U disk manufacturer, we can only think of another way.

So I used the 360 ​​U disk authenticator. Click on the software to start the detection. The process is normal and it was detected quickly. The U disk showed its original shape immediately. , only 64GB. In order to ensure accurate detection, I also tested the borrowed brand USB flash drive, and the test results were accurate.

What is certain now is that this 2TB USB flash drive has been expanded, and 2TB has shrunk to 64GB, a difference of 31 times. Fortunately, it is not reduced to 16GB. If it is 64GB USB3.0, the price is still acceptable.

Is that really USB3.0?

When I copied the data, I found that the speed was really slow. When copying 1.5GB of data, it could be maintained at about 17-19MB/s. The fluctuations in the entire process were relatively small (two fluctuations It stabilized after that), but when copying 130GB of data, the transfer rate did not exceed 10MB/s. The longer the time, the lower the rate was limited, and the transfer rate was tens of KB.

The reason for this is that the manufacturer limits the transmission speed so that data larger than the actual memory of the U disk cannot be transmitted. In this way, it will not prompt that the U disk is full and the expansion problem is discovered. Needless to say, today’s manufacturers are getting smarter and smarter.

Generally, the actual transfer rate of USB3.0 is around 150MB/s. Obviously, this U disk does not follow the USB3.0 protocol. From the actual test, it does not exceed 20MB/s, which means that even USB2.0 cannot keep up (the actual speed of USB2.0 is 20-30MB/s), which largely means that this U disk uses second-hand recycled particles.

In order to verify again, I tested it through ChipEasy software. The display results also prove that my previous statement is correct. There is no doubt that the protocol is USB2.0. As for why manufacturers dare to write USB3.0, I guess They just use Disk 3.0 to fool ordinary people.

In addition, by checking the interface of the U disk, you can also determine that the U disk is USB2.0, USB3.0 has 9 pins, and USB2.0 has 4 pins. This This USB flash drive has 4 pins and is made to look like USB3.0 blue.

Through the above in-depth understanding, what can be determined is that this is a 2TB USB3.0 U disk with an expanded capacity and a virtual label. The parameters of the virtual label are listed just to attract attention.

After that, I went to JD.com’s self-operated store to look at the Kingston brand U disk. It turned out that it also had 64GB of memory and was USB3.2. The price was 29.9 yuan, which was cheap. I paid 10 yuan. From this point of view, this "2TB USB flash drive" from Pinduoduo is not cheap at all. I decisively bought this Kingston 128GB USB flash drive for 54.9 yuan. After all, the brand is still more guaranteed.

When buying something, don’t be attracted by some words. Merchants also use this to stimulate consumers to buy. I think there are a lot of sales of 2TB USB flash drives like this. Woolen cloth.

To sum up, Pinduoduo’s products are not necessarily cheap. Just like this U disk, it is actually a lot more expensive. It is not a brand, it is just What we can see, we don’t know if any corners have been cut in places we can’t see. If you want to use it with confidence and for a longer time, try to choose the brand, and the price is not much, and some are even cheaper.

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