Nowadays, many U-disks on the market are shrinking more or less, and the actual capacity will be much less than the marked capacity. This requires you to have a “eyes of the eye” to distinguish the U disk of the market is expanded. System Home Xiaobian introduces you how to identify and expand the U disk. In the previous section, I saw a number of shops selling a large-capacity U disk at a loss, 128G less than 30 yuan, and the capacity is quite old mobile hard disk, the price is quite high. I saw thousands of monthly sales of the store, and the users were highly praised. The author also bought one of the ideas for trial use. The stainless steel rotating shell was marked with the words Kingston. The volume was not small and the size was right. The appearance was not bad. Copy a 4G win7 system and start the installer normally. First, the 360U disk identifier was used for testing. The result is: 360U disk identifier detection results are somewhat contradictory. The U disk capacity is 124.39GB, the capacity is normal, and the U disk nominal capacity exceeds 100G, which is most likely a shrink disk. The U disk expansion detection tool MyDiskTest (version 2.98) was used for rapid expansion test. The test shows that the report capacity is 124GB. The U disk is not like the expansion disk, but the rapid expansion test may not give an accurate conclusion! ”. In order to get accurate information, the software is used for data integrity verification. The verification is to fill in the data to the U disk. The area where the data is written shows yellow. The process of writing several megabytes per second is extremely slow, and it is written continuously for about 20 hours. It is almost the longest record of the author's continuous boot, and only writes 70GB of data. The area filled in is just halfway. It is judged that the capacity of the remaining U disk should be 128G, and the read and write speed of the U disk is advanced. The data integrity check is ended and the final result is not given. In order to compare performance, I used MyDiskTest (version 2.98) to read and write speed test on 128GU disk and the Kingston U disk at hand. The results are shown in Table 1: Table 1 Summary of 128G U disk and Kingston U disk speed test results (USB2) .0 interface): From the random read and write speed, file copy speed and other test items to see the 128GU disk and Kingston U disk indicators have a considerable gap, although the writing speed is slow, after all, the price is cheap, as a backup storage is still acceptable, this When I found the same 128GU disk on the Internet as long as 25 yuan, I am going to buy two more backup storage. For the sake of caution, I used the U disk chip detection tool chip chip wizard ChipGeniusV4.00 to detect the 128GU disk. This test makes 128GU. The fox's tail is exposed, and it can be seen that its total flash memory capacity is only 8G. In order to verify whether the detection capacity is correct, the file is copied into the U disk in turn. When the total file capacity is 8G, the file can be run. If the file is over 8G, the file can be copied normally. It is verified that the total detection capacity is 8G. The U disk is not the loss sales described by the store advertisement. Instead, it uses the U disk mass production tool to expand the 8G into a 128G expansion U disk. If it is worthy to use it as an 8GU disk, the author will purchase the recently purchased Yijie 16GU. The disk was tested with MyDiskTest (version 2.98) for comparison. The results are shown in Table 2: Table 2 Yijie 16G U disk speed test results summary: This Yijie USB3.016GU disk is connected to the USB2.0 interface compared with the 128GU disk, the maximum read The speed is more than 2 times, the maximum writing speed is more than 3 times. If connected to the USB3.0 interface, the maximum read/write speed is more than 4 times that of the 128GU disk. The price is 40 yuan in an online store, and the 128GU disk is slow. After the expansion, the reliability is poor, the data is priceless, and the data loss loss is large. Even if it is used for 8GU disk, it is not cost-effective. Since the buyer said that he was not satisfied with the return, the author successfully returned the goods. Why expand the U disk store can sell thousands of dollars in January, and they are all praised. This is because the U disk has been hand-footed and can be obtained by the inspection of tools such as 360U disk identifier and MyDiskTest rapid expansion detection. Trust. Buyers generally do not do data integrity check, because the large-capacity U disk detection time is too long, the most common is to copy a few files to verify that these files are not large, can be used normally after copying, so the initial No problems were found, and the store’s praise for cash back activities was given to everyone. This reminds us that online shopping sales and evaluation can only be used as a reference. We cannot trust the whole letter. Although online shopping is cheap, but the transaction is much lower than the market price, we must be extra cautious. Try to choose a seller with good service attitude, not just see its advertisement. Days are not satisfied with the return, you must tell the good return and return postage on Want Want, in order to provide evidence when the store asks the manager to intervene. Finally, the method for identifying and expanding the U disk is as follows: 1. The chip is detected by ChipGenius or ChipEasy; 2. If the detected capacity does not match the nominal capacity, copy the file exceeding the detection capacity to the U disk. Then, verify that the copied files are running normally one by one, and one file cannot be correctly operated to be judged as a U disk or a bad disk. This article comes from [System Home] www.xp85.com