The difference between flash disk and u disk

"Flash disk" is one of the earliest names of this product, and now its name has long been everywhere, numerous, what "flash disk", "portable Q" and so on. Originally, the flash drive was a new type of storage device invented by the Ronco company, because it did not require additional physical drives, and the capacity was large, from 16M to 2GB optional, breaking through the limitations of the 1.44M floppy disk. In terms of read and write speed, USB flash drive adopts USB1.1 or 2.0 interface standard, and the read and write speed is greatly improved compared with the floppy disk. In terms of stability, the USB disk has no mechanical reading and writing device, which avoids damage caused by mobile hard disk easy to be bruised, dropped and other reasons (I believe you must also have the painful experience of important files being destroyed by the hateful floppy disk). Because of the use of USB interface, so can be hot swappable, no external power supply, only the size of the thumb, weight of about 20 grams, carry and use is very convenient, any computer with USB interface can use USB flash drive. Later, the flash drive this storage thing was optimistic by many companies, and a new term - flash memory was born.

Flash drives can be used to exchange data between computers. In terms of capacity, the capacity of the flash drive is optional from 16MB to 2GB, breaking through the 1.44MB limitation of the floppy drive. In terms of read and write speed, flash disk uses USB interface, read and write speed is much higher than the floppy disk. In terms of stability, the flash drive has no mechanical reading and writing device, which avoids damage caused by easy bruising and falling of the mobile hard disk. Some models of flash drives have encryption and other functions, so that users can use more personalized. Flash drives are compact and easier to carry.

Flash memory is a type of long-lived non-volatile memory that can be deleted and rearranged in storage units called blocks. Flash is a variant of electrically erasable read-only memory (EEPROM), which differs from flash in that it can be deleted and rewritten at the byte level, so that EEPROM updates more slowly than flash. Flash memory is often used to store control code, such as the Basic Input Output System (BISO) in personal computers. When the BIOS needs to be changed (rewritten), flash can be written to block(rather than byte) sizes, making it easier to update. Flash memory, on the other hand, is not as useful as arbitrary access memory (RAM), which must be addressable at the byte (not block) level.

Flash drive

Usb flash drive is a kind of flash memory, also called flash drive, USB flash drive, the biggest feature is: small, large storage capacity, cheap price. It is one of the mobile storage devices. General U disk capacity is 64M, 128M, 256M, 512M, 1GB, 4GB, 16GB and so on. It's easy to carry and is a mobile storage device, so of course it's not plugged into the case, we can hang it on our chest, hang it on a key chain, or even put it in our wallet.