Portable Hard Disk

Introduction to Portable Hard Disk alias name is Portable ssd

Portable hard disk is a kind of portable storage device, which uses the hard disk as the storage medium, so that computers can easily exchange large-capacity data. The device is designed to emphasize portability, making it ideal for situations where you need to carry large amounts of data around with you. There are two main types of mobile hard drives: mobile solid state drives (SSDS) and mobile mechanical hard drives (HDDS). Mechanical hard drives are generally more cost-effective and relatively inexpensive, while solid state drives offer faster transfer speeds and are suitable for users who need to transfer data quickly, especially when working away from home.

The components of a mobile solid-state drive usually include a main controller, a memory unit, and a bridge chip. The housing is generally made of metal, which not only helps to dissipate heat, but also provides protection against pressure and shock. When the hard drive is connected to a computer or phone, an indicator will light up, indicating that the hard drive is working. In terms of interface, the common USB 2.0/3.0 type, and more high-end products may be equipped with USB 3.2Gen 2x2 interface, which means that the portable hard disk transmission speed of this interface can reach 2000MB/s, which means that several GB of video files can be transferred in a few seconds.

Product characteristics

Large capacity

Portable Hard Disk can provide a considerable storage capacity, is a more cost-effective mobile storage products. Portable hard disk can provide users with large storage capacity and good portability at an acceptable price range. At present, the mobile hard drives on the market can provide 320GB, 500GB, 600G, 640GB, 900GB, 1000GB(1TB), 1.5TB, 2TB, 2.5TB, 3TB, 3.5TB, 4TB and other capacities, up to 12TB capacity, to a certain extent to meet the needs of users. With the development of technology, the capacity of Portable Hard Disk will be larger and larger, and the volume will be smaller and smaller.

Small size

Most of the Portable Hard Disks use USB and IEEE1394 interfaces, which can provide higher data transmission speed. However, the data transmission speed of the Portable Hard Disk is limited to a certain extent by the interface speed, especially in the USB1.1 interface specification products, when transferring a large amount of data, it will test the patience of the user. USB2.0 and IEEE1394 interfaces are much better.

High speed

Most of the Portable Hard Disks use USB, IEEE1394, eSATA interfaces, which can provide a high data transmission rate. However, the data transmission rate of the Portable Hard Disk is limited by the interface speed to a certain extent, especially on the products of the USBl.1 interface specification, which will test the patience of the user when transferring large data. The USB2.0, IEEE1394, eSATA interfaces are much better. USB2.0 interface transmission rate is 60MB/s, IEEE 1394 interface transmission rate is 50 ~ 100MB/s, and eSATA, when exchanging data with the host, read a gigabyte order of large files in a few minutes, especially suitable for video and audio data storage and exchange.

Easy to use

Now the PC is basically equipped with USB function, the motherboard can usually provide 2~8 USB ports, some displays will also provide USB adapters, USB interface has become a necessary interface in personal computers. USB devices can be used in most versions of WINDOWS operating systems without the need to install drivers, with a true "plug and play" feature, flexible and easy to use.

Safe and reliable

Data security has always been the most concerned issue of mobile storage users, and it is also an important standard for people to measure the performance of such products. Portable Hard Disk has won the favor of many users with the advantages of high speed, large capacity, lightweight and convenient, and the greater advantage is the security and reliability of its stored data. This kind of hard disk is similar to the structure of the laptop hard disk and uses silicon disk. This is a more durable platter material than aluminum and magnetic, and has greater storage capacity and better reliability, improving data integrity. The use of silicon as a material disk drive, featuring a smoother disk surface, effectively reduces the number of irregular disks that may affect the reliability and integrity of the data, and the higher disk hardness makes the USB hard disk have high reliability.

Matters needing attention

The use of Portable Hard Disk should pay attention to the following problems:
1, do not use for a long time. Use a Portable Hard Disk with general materials, it is best not to plug in the computer for long-term work, Portable Hard Disk is used for temporary exchange or storage of data, not a local hard disk. Compared with the internal hard disk will work in a harsh environment at all times, the working time should be shortened as much as possible.
2. Do not defragment the disk. Do not defragment the removable hard disk, otherwise it will easily damage the hard disk. If you really need to organize, the method can be used to copy the data in the entire partition, and then copy back.
3, do not mix the power supply line. Do not mix the power cables. Because the power cables of the Portable Hard Disk box are dedicated, the voltage of the power cable interface may be different. If you insert them improperly, the box will be burned, and the hard disk will be burned.
4. Don't beat. Don't beat, take lightly; Pay attention to the temperature, do not overheat; Dry and waterproof, pull back first.
5, do not implement hot swap in the transmission process to prevent electromagnetic, dust, water and other external interference.

dimension

At present, mobile hard drives can be divided into three types by size: 3.5-inch desktop hard drives; 2.5-inch laptop hard drive; 1.8-inch micro hard disk. Among them, the 3.5-inch desktop hard disk has the advantages of fast speed and large capacity, but it is large, heavy and inconvenient to carry, and because the hard disk is designed for the desktop, the shockproof performance is poor, but there are still certain advantages in terms of price and capacity. 2.5-inch notebook hard disk is specially designed for the notebook, the size and weight are smaller. There is also a special design in shock resistance, good shock resistance, the most used in the current Portable Hard Disk. 1.8 inch micro hard disk, also designed for notebooks, good seismic performance, and size, weight is also the smallest of the three, but its price is higher, the capacity is smaller, more difficult to popularize, more suitable for special needs users.

capacity

Capacity is the storage space of the mobile hard drive. In 2006, the mainstream hard drive capacity was increased from 160GB to larger capacity. At present, the 250G and 320G products are quite cost-effective. The world's largest single disk capacity reached 750G, 320G product market has been quite mature, the price is also very reasonable. And 400G or above products are still a high-priced series, ordinary users rarely consider. Although 160G and 250G are the mainstream capacity, but limited to cost and actual use needs, for general office and home applications, the choice of 80G or even lower 40G has been fully able to meet the needs.

port

The interface type refers to the type of interface used by the Portable Hard Disk to connect to the computer system, rather than the interface type of its internal hard disk. Because the Portable Hard Disk can be connected to the system through the interface, the interface determines the performance and data transmission speed of the connection with the system. At present, the common data interfaces of mobile hard drives are USB and IEEE1394. USB is the mainstream interface of Portable Hard Disk at present, and it is also the interface of almost all computers, with the advantages of hot swappable, unified standards, and multiple external devices. There are two USB standards: USB1.1 and USB2.0. The USB2.0 transfer speed is up to 480Mbps, which is 40 times that of the USB1.1 interface. USB2.0 requires motherboard support and can be backward compatible. The same brand USB2.0 Portable Hard Disk box is 30 to 50 yuan more expensive than the USB1.1, but because of the huge difference in speed, USB2.0 has become the mainstream of the market.