U disk capacity smaller how to do?

1, U disk real capacity is not as big as the Mark

A lot of children's boots to buy a U disk after the big call, clearly 8G u disk, buy the hand, in the computer to see only about 7G, and 16G is only 14G around, less than nearly 2GB space. What about the size of the U disk?

In fact, this phenomenon is normal, we all know that computer computing is the use of binary, so the system on the capacity of the calculation is 1MB=1024KB,1GB=1024MB, and so on. and u disk, hard disk manufacturer calculation is every 1000 for one system, that is 1MB=1000KB,1GB=1000MB.

So we can see, U disk callout capacity and nominal actual capacity there are some small error, this is mainly due to the manufacturer of capacity calculation and computer calculation methods caused by different, the other U disk internal firmware will occupy a small amount of space, so the usual U disk capacity of the approximate algorithm real capacity on 93%, In other words, 8GB nominal u disk, actually usable in 7G or so is normal, the computer on the hard disk is also the case.

　　2, U disk capacity becomes small serious

If you buy 8GB u disk its true capacity of only 4G or less, this situation is more for the shrinking U disk, also known as "expansion disk." The U disk is illegal manufacturers use a mass production tool software, change the main control information on U disk, the U disk capacity is marked to much larger than its actual capacity, to defraud the means of consumers profiteering. When the actual capacity of the U disk is less than or equal to its nominal 90%, that is identified as the existence of quality problems of the shrink U disk.

A lot of methods to detect shrinkage U disk, the simplest is to go inside a U disk copy a large file to see whether the file can be copied, and can be opened. For example, we purchased a 8GB u disk, the theory is the actual usable capacity of at least 7GB, so we can be a USB u disk copy of the large file of about 16 G, to see whether the copy can be copied into, whether the normal open and so on.

If all the data is read correctly, it's good. If only a part of the can, it is likely to be the expansion disk, in fact, the hard disk with the U disk has been working in the "looped" mode, when users copy large files, if the space is occupied by automatically erasing the front of the space to continue to copy, does not prompt for insufficient space.

In addition to this shrinking expansion u disk we can also through a number of tools to quickly detect, such as mydisktest, Jinshan u disk Guards, 360U panel, etc. can quickly detect the U disk for expansion of the shrinkage of the U disk.

Shrink u disk (Expansion u disk) plainly is a false u disk, the small size of the disk is a serious problem, so we are unable to enlarge its capacity, so in the purchase of U disk, we are the most formal way to buy, do not cheap, to buy this shrinkage of the fake U disk.

　　3, U disk capacity suddenly become small

This situation is, we have a U disk before the larger capacity, but the format, the capacity becomes smaller. For example, we purchased a 8GB capacity U disk, between approximately 7G is about the available space, but after a period of time formatted, the capacity becomes 6GB or smaller.

The cause of this situation, in addition to the above has been introduced to the possible shrinkage of the USB U disk, there is a possibility is that the U disk itself has a bad block, the format will automatically block the damaged storage part, so the capacity becomes smaller. If the test U disk is not a shrink u disk, and the format of the size of the smaller, then the U disk itself may appear some problems.

For this U disk capacity is smaller, what should we do? The current feasible method is to use the relevant software to try to repair, if it can be repaired, you can restore some of the storage space, if not repaired, that can only be used.

U disk capacity is small, we can try this section called "Uformat Chinese Version" software (Baidu Search can find download), the tool has a strong memory card format function, you can repair some USB disk or memory card some internal errors.

Uformat is a professional memory card format tool that can repair most of the memory card hardware software problems, format the phone can not be formatted memory card.

Generally speaking, u disk capacity becomes smaller mainly for the above three kinds of reasons, we need to find their own U disk belongs to that kind of situation, and then selective inspection or operation can be.