My 16G Kingston USB flash drive has become 3 68G after mass production, what should I do?

Your U disk is expanded with a 4G chip, that is to say, the actual capacity of your U disk is only 4G, the 16G you saw before was processed by JS with software, and what you see is just an illusion, so when you copy something more than 4G, it is difficult to copy it in, even if you are admitted, the file will be broken or become garbled, and it may also be lost, and now there are many such expansion U disks on the market, especially Kingston's most, you should be especially careful when buying, so as not to be deceived.

Your USB flash drive is likely to be expanded, and the actual capacity is not so much, so you can't copy such a large file when you copy a file! Causing file loss or something, your Kingston doesn't look like the real thing!

That's how big the USB flash drive capacity is:

The positioning of USB flash drive manufacturers is 1GB=1000MB, 1MB=1000KB, and 1KB=1000B

But Windows is not like this, he is 2 several times the square is 1GB=1024MB,1MB=1024KB,1KB=1024B

This is the difference in the level of computer computing, not the problem of USB flash drive and then my country.

The General Specification for Information Technology Mobile Storage Flash Drives stipulates that "the actual usable capacity of the product is greater than 90% of the nominal capacity or the usable capacity is clearly indicated on the product packaging", that is, the capacity error of the "U disk" is allowed to be within 10%.

Take my 16G USB flash drive as an example, the computer displays, but the first byte is 16....

That is, the standard 16G USB flash drive.

Kingston memory cards and USB flash drives, remember to pay attention to them if you like!

Hello:——1, the production of U disk, with 1000m as 1g, is a decimal measurement. The binary 1G of the computer is 1024M, so there is a capacity difference between the two.

2. The specific calculation can be: 64000m (64g) 1024.

3. When the U disk is mass-produced at the factory, there will be some files existing in the U disk. So there may be errors in the data.

There is a high probability of this, that is, the USB disk expansion disk, and the large-capacity ones bought online are basically expanded. Especially Xinbang's, it is even more common!

In fact, you didn't try it at the time, and the copy of things was no more than 8g

Now 4G is basically a normal capacity, that is, the unstable storage unit is eliminated.

Before, it was more than 4G because some could be saved, but it was unstable and prone to problems.

Theory Mountain can be restored to the previous 16g, but it is not necessary!

References are all mass-produced content.

1.If there is a drive letter on the computer, use the latest chipgenius (Huajun has it) software to check the chip of the U disk, if this software can't be found, you have to find the person who repairs the U disk to see.

2. If there is no drive letter on the computer. Then your USB flash drive can basically be still. If so, we will re-mass produce it with a mass production tool corresponding to the chip model.

3. There is also a software (uwritetest) that can measure the actual space of the U disk. Here's how:

uwritetest:

We know that by formatting the USB flash drive first, copying it into ** in order, and observing whether ** is displayed in the form of thumbnails can know the quality of the corresponding track. The disadvantages of manual replication are that first, it is impossible to guarantee the order of the copied files (which is more troublesome when calculating the real capacity of the USB flash drive), and second, a large number of test sources have to be prepared to copy into the USB flash drive.

UwriteTest is to replace your copying work, and automatically rename and copy the jpg file you specified into the USB flash drive. You can easily select all the visible **view attributes to get the real capacity of the USB flash drive,You can also know the place where the bad channel of the USB flash drive occurs by viewing the **serial number that is not displayed。

In addition, you can check the speed at which files are copied during copying to see the performance of the USB flash drive.

Tricks for uwritetest:

Name a file together with uwritetest, and uwritetest will default to the test source file when it starts.

When testing multiple USB flash drives, you don't need to close uwritetest, you can directly pop up the USB flash drive and replace it with a new USB flash drive, and uwritetest will update the drive letter of the USB flash drive to be checked with Windown.

Use of uwritetest results:

If you find that there are a large number of bad sectors at the time of purchase, you can choose other models.

If you have purchased an expanded USB flash drive and do not have a mass production tool to restore its real capacity, in order to ensure the correctness of data writing, you can delete all bad files and keep good files (the free space at this time is the bad sector space). Check the properties of the USB flash drive to obtain the amount of available space on the USB flash drive. Then use RAR's volume compression function to compress a file that is larger than the available space, select "Storage" as RAR compression mode, and fill in the volume size with the free space obtained above (it can be slightly larger).

After compression, you will get.

Copy to a USB flash drive to occupy a bad lane position, change the attribute to read-only and hide it and never use it.

The true capacity of the USB flash drive (m) = Number of files displayed × File size 1024

Note: It is best to quickly format the USB flash drive once to ensure the continuity of the cluster order when the file is written.

The test source JPG must be intact.

It is best that the test source JPG is not on the same disk as the USB flash drive under test (the copy speed is fast).

It is best to test the source JPG at least 1M to avoid generating too many files.

Your USB flash drive should have been expanded,The expanded USB disk,No matter how it expands, it can only use the actual capacity,4G disk is 4G disk,Change the name to 16G or only use 4G capacity,And there will be problems with read and write operations。

Therefore, recall whether the capacity used before mass production exceeded 4G, and if it has exceeded 4G in normal use, it still has to be repaired by mass production. If it does not exceed 4G during normal use, it means that your USB flash drive itself only has 4G, either let the merchant change it, or only use 4G.

Either you chose the wrong mass production tool, or it was a disguised 16G USB drive.

Have you done a good job of the USB drive again? I've also had this ...... of yours

Yours is a copycat expansion disk, and the actual capacity is expanded by a 4GB chip.

Normal, normal! Because the U disk manufacturer is calculated according to the conversion unit of 1g=1000m, and the computer is calculated according to 1g=1024m, the actual capacity of the U disk with a nominal capacity of 16G on the market is only 16*1000=16000M. In this 16000m capacity, divide 16000m by 1024m g (computer) =, and then deduct some system files to occupy space, which may be about so much!

This situation generally appears in the storage industry on hard disks, USB flash drives, ***, MP4 and other storage products, the principle is basically the same, because these products have hidden partitions, used to support hard disks, USB flash drive boot and ***, MP4** and other special functions. So I bought a 16G USB flash drive, but it was less than 16G on the computer, as long as the files on my computer can be copied into the left and right, and these files can be used normally, it is normal, not a false standard USB flash drive.

Normal, if it shows 16g it is fake. The calculation method is different, to type more words, you can know that 1G is equal to more MB, and there is no point in copying it.