My 1G USB flash drive is only 994MB

A note about the capacity of the hard drive.

People always say that the system display capacity does not match the nominal capacity of the hard disk.

Here's a closer look:

In the Windows system, the basic unit of data is byte, that is, we often say bytes, a byte can store an English letter or half a Chinese character, because 1byte is composed of 8bit binary numbers, so the carry system in the system is also based on the binary system.

So in Windows.

1kb=2^10 b=1024b

1mb=2^10 kb=1024kb

1gb=2^10 mb=1024mb

1tb=2^10 gb=1024gb

However, the computing capacity of hard disk manufacturers is based on the decimal system.

So the hard drive has a nominal capacity.

1kb=10^3 b=1000b

1mb=10^3 kb=1000kb

1gb=10^3 mb=1000mb

1tb=10^3 gb=1000gb

So it is easy to calculate the nominal capacity of the hard disk in Windows: 12g=12*10 9b2 30=

20g=20*10^9b/2^30=

30g=30*10^9b/2^30=

40g=40*10^9b/2^30=

The larger the capacity, the more "loss" it seems.

In fact, it's just that the different carry systems give hard disk manufacturers a chance to exploit loopholes to make their hard disk capacity "say" very large, but "look" is not so big, in addition, your drive letter and so on also take up some space.

It's not**right,**It's generally about 1003MB,Maybe the black film has been remass-produced.,Shielding some bad blocks.。

It's normal...

For example, my *** says 256, but in fact, the upper limit of storage is only about 240

The capacity is normal, please do not use quick format for formatting.

1GB is referred to as 1G 1G = 1024MB, 1MB = 1024KB, 1KB = 1024 bytes.

GB, also known as gigabyte (GB, gigabyte, also known as gigabyte or gigabyte or gigabyte or halberd in China), often abbreviated as G, is a decimal unit of information measurement. Gigabytes are often confused with gibibytes, the binary unit of measurement for information. It is often used to indicate the storage capacity of storage media with large capacity, such as hard disks and storage.

Meaning bytes.

K is the abbreviation of Kilo in English.

It means thousand. You can consult the English dictionary].

M is the abbreviation of million.

It means millions.

Or megag is the abbreviation of English giga.

It means a billion.

Or gigabit, and the smallest unit is bit [bit or bit], their conversion relationship is as follows, why is it 1024?

Because computers all use binary.

You should know.

And the 10th power of 2 is 1024

8 bits (bits).

1b (bytes).

1024b = 1kb = 2 to the 10th power.

1024KB (kilobytes) = 1MB (megabytes) 2 to the 20th power1024MB = 1GB 2 to the 30th power.

1024GB = 1TB2 to the power of 40.

In the computer, K is the abbreviation of KB.

Because we all know that the unit is b [byte, English byte]k means thousand.

MB is a megabyte.

You can also shorthand it to m [megalobyte].

1kb=1024b

No matter what the disk capacity unit is the same, generally 1g is equal to 1024m, that's it!

The calculation method of storage space is different, and the calculation method of general manufacturers is different from the calculation method of 1000m=1g in our actual life; If the manufacturer finally installs a strict hard disk space to calculate, it is to install 1024m=1g to calculate, of course, it will be a little smaller than the 1g space you bought.

As for yours, there will be less of this, that is the problem of the manufacturer.

It's like a 16G USB flash drive that can be bought for 28 yuan on the street, but in fact, it is less than 10g when you get it in your hand. Far less than 16g.

Something similar

Format the disc with the installed system, because your USB flash drive is partitioned, generally formatting is useless, you want to delete the partition.