What is the difference between a mobile hard disk and a USB flash drive? What does a mobile hard disk solid state mean?

In the process of using computer storage devices, many friends can't tell the difference between mobile hard disks and USB flash drives. In fact, the difference between the two is very big. The following is the tips for choosing mobile hard disks shared by Encyclopedia Knowledge Network, I hope it will be helpful to everyone.

Contents of this article

1. What is the difference between a mobile hard disk and a USB flash drive?

2. What does mobile hard disk solid state mean?

3. How to choose a mobile hard disk

What is the difference between a mobile hard disk and a USB flash drive?

1. Difference in storage principle: The mobile hard disk uses magnetic media as storage and has a mechanical part. The USB flash drive uses semiconductor materials as storage units, also known as solid state storage, and has no mechanical part.

2. Energy consumption difference: mobile hard disk consumes relatively more energy, and the data cable of mobile hard disk generally can be plugged into two USB ports. The energy provided by the USB flash drive is relatively small, generally not exceeding 100mA.

3. Size difference: The mobile hard disk is relatively large, much larger than the USB flash drive. The USB flash drive is relatively small and more convenient to carry.

4. Security difference: Data errors in mobile hard disks can be compensated, and security is relatively guaranteed. Because USB flash drives have no mechanical parts, they have better vibration and moisture resistance than mobile hard disks.

5. Difference in capacity: The capacity of mobile hard disk is large, and the minimum capacity will not be less than 128G. The capacity of USB flash disk is commonly 1G-32G, and the largest one is 128G.

What does mobile hard disk solid state mean

A mobile solid-state hard drive refers to a solid-state hard drive that can be carried with you. The main body of the solid-state hard drive is actually a PCB board, and the most basic accessories on this PCB board are the control chip, cache chip (some low-end hard drives have no cache chip) and flash memory chip for storing data.

Solid State Disk (Solid State Drive or Solid State Drive, referred to as SSD), commonly known as solid state hard disk, is a hard disk made of solid-state electronic storage chip arrays. It is named because solid capacitors are called Solid in Taiwanese English. SSD consists of a control unit and a storage unit (FLASH chip, DRAM chip). The interface specifications and definitions, functions and usage methods of solid state hard disks are exactly the same as those of ordinary hard disks, and the product appearance and size are also completely consistent with ordinary hard disks. It is widely used in many fields such as military, automotive, industrial control, video surveillance, network monitoring, network terminals, electricity, medical, aviation, navigation equipment, etc.

How to choose a mobile hard disk

1. Interface. If you are using a Windows platform, you can buy a USB 3.0 interface, which is the trend of the future, and it is backward compatible, so you don't have to worry about USB 2.0 being unavailable. If it is a Mac, it doesn't matter, 3.0 is hopeless.

2. Hard disk speed. There are mainly two types now: 5400 and 7200. The difference between them is speed and heat dissipation. The 5400 is slower, quieter, and has less heat dissipation.

3. Portability. 2.5 or 3.5. If you carry it often, you can buy the 2.5, which is small and can be put in a bag. If you rarely carry it out, you can buy the 3.5, which is cheaper, but has a power supply and takes up a lot of space.

4. Price. Currently, a 1TB hard drive generally costs around 700 yuan. If you want to buy a fancy-designed version, the price will be higher.

5. Capacity. If you are not a user doing CG, film and television editing, or design work, 1TB of capacity is actually a lot. For daily use, 500G is enough. The capacity must be determined according to personal needs, and do not cause waste.