Calculation process:
16GB= 16*2^30B
=2^4*2^30B
=2^34B。 Therefore, the number of bytes stored in 16GBU disk is 2^34B.
Extended data:
U disk function classification:
Non-driving type:
Driverless products can be used normally under Windows 98/Me/2000/XP, Linux and Mac OS which support USB mass storage protocol, which truly embodies the convenience of "plug and play" of USB devices.
Encryption type:
The encrypted USB flash drive can not only encrypt the stored contents, but also be used as a common USB flash drive. Generally speaking, there are two kinds: one is hardware encryption, such as fingerprint identification encryption USB flash drive, which is expensive. Generally speaking, for users in special departments, hardware encryption is more secure.
Startup type:
The appearance of startup disk makes people sit up and take notice of this portable product. As the name implies, the boot USB flash drive adds the function of the boot system, and makes up for the defect that the encrypted USB flash drive and the driveless USB flash drive can't start the system. It is the appearance of this product that accelerates the process of floppy drive being eliminated. To start the system, the USB flash drive must simulate a USB peripheral.
Advantages of USB flash drive:
1, USB flash drive is very simple and convenient to use.
There are many kinds of USB interfaces. Strictly speaking, only USB flash drives with USB interfaces can be called USB flash drives. Does this mean that most modern operating systems can read and write flash drives without installing additional drivers? . U disk is displayed as a block logic unit in the operating system, which hides the complex details needed by internal flash memory.
When in use, there is no need for driving, external power supply, plug and play, and on-site plug and play.
2. The biggest feature of USB flash drive is its compactness and portability.
The general capacities of USB flash drives are 1G, 2G, 4G, 8G, 16G, etc. Compared with traditional storage devices such as floppy disk, CD-RW and Zip disk, USB flash drive has obvious advantages. Mainly manifested in: the volume is very small (only the size of the thumb) and the weight is only about 20 grams; Large capacity.
It hardly allows water or dust to penetrate, and it will not be scratched, which are serious problems in old portable storage devices (such as optical disks and floppy disks). The solid-state storage design used in flash drives enables them to withstand unintentional external shocks.
4. Large storage capacity
Although the flash drive is small, its storage capacity is relatively large.
Baidu encyclopedia -U disk