Mobile hard disk how to add password, mobile hard disk encryption method

SSD(Solid State Disk or Solid State Drive), also known as electronic hard disk or solid state electronic disk, is a hard disk composed of a control unit and a solid state storage unit (DRAM or FLASH chip).

SSD generally refers to the use of FLASH memory chip composed of SSD solid state drive, is the use of flash flash memory particles as a storage unit, no longer use the traditional mechanical storage method, the use of analog virtual traditional hard disk access methods and sectors, etc., can also be simply understood that the SSD is a hard disk interface (SATA/ATA, etc.) of the "big U disk", The difference is that there is no mechanical structure, the use of traditional NAND Flash characteristics, in the way of block writing and erasing to read and write the function, so in the efficiency of reading and writing, very dependent on the development of flash technology, compared with the traditional mechanical hard disk, with low power consumption, shock resistance, high stability, low temperature and other advantages.

FLASH based solid state drive (IDE FLASH DISK, Serial ATA Flash Disk) : The use of flash chip as the storage medium, the appearance can be made into a variety of shapes, such as: laptop hard disk, micro hard disk, memory card, flash disk and other styles. The biggest advantage of this SSD is that it can be moved, and the data protection is not controlled by the power supply, and it can be adapted to various environments, but the service life is not high, and it is suitable for individual users.

DRAM based solid state drive: using DRAM as a storage medium, the current application range is narrow. Emulating the design of traditional hard disks, it can be configured and managed by the file system tools of most operating systems, and provides industry-standard PCI and FC interfaces for connecting hosts or servers. The application mode can be SSD disks and SSD disk arrays. Is a high-performance memory, and the service life is very long, the drawback is the need for independent power to protect data security.
Advantages of SSDS:

1. The SSD is 20-30 grams lighter than the conventional 1.8-inch hard disk, and can be widely used in portable mobile products such as laptop computers and satellite positioning devices.

2. Durable and shock-proof. Due to the use of all flash memory chips, SSDS will not affect normal use even when moving at high speed or even accompanied by a flip tilt, and the possibility of data loss in the case of accidental dropping or collision with hard objects can be minimized.

3. The operating noise value of SSD is 0 dB. It has the characteristics of no mechanical parts and small heat output of flash memory chip and fast heat dissipation.

4. Fast data access speed. Windows Vista, the next generation of Microsoft's operating system, supports a technology called ReadyBoost, which uses flash memory to reduce the number of times commonly used software is called from a slow mechanical hard drive, minimizing read delays. This technology can be said to be ready for SSD.
Disadvantages of SSDS:

1. The high price hinders the popularity of SSD, and the price is several times or even dozens of times higher than the mechanical hard disk with the same capacity.

2. The capacity of SSD is small, and the current 500GB or even TB hard disk, while the maximum capacity of SSD is only 128GB.

3. The lack of terminal device support is also another major problem SSDS face.