The read speed of the mobile hard disk is 21, and the write speed is 11, which is not a good 20G

It's a bit slow. My portable hard drive is relatively average, with a read speed of more than 30 and a write speed of about 20. But I haven't really seen a 20G mobile hard drive.,It should be relatively old.,This speed is not bad.。

<> have a few suggestions:

1.It is recommended to upgrade your anti-virus software (such as 360) to prevent all viruses.

2. It is recommended to clean up the disk and delete unnecessary programs and files.

3. Disk defragmentation is recommended.

4. It is recommended to clean up the temporary folder.

Transfer rate of the hard disk:

As the most important data storage device and data exchange medium in the computer, the speed of the hard disk transfer rate directly affects the running speed of the system. Different types of hard drives often have very different transfer rates. Now there are three main types of mainstream hard drives:

According to different interfaces, it can be divided into parallel ATA hard disks (i.e., IDE hard disks), SCSI hard disks and Serial ATA hard disks.

In terms of actual usage, when using the interface, the maximum speed of the mobile hard disk is 40-60MB s, and the speed of the mobile hard disk of the interface is 60-140MB s (depending on the performance of the hard disk itself), and the speed of the mobile hard disk is not easy to reach the maximum value of the theoretical speed of the interface.

If the internal hard disk is a mechanical hard disk, the speed is 100-160MB s, and the SSD can reach 400MB s or even higher.

1. The carrier in the mobile hard disk is the same as the ordinary hard disk, which is generally divided into mechanical hard disk and solid state disk, and the size is divided into inches (larger) and inches (smaller).

2. Mobile hard disks and ordinary hard disks are transmitted by cables, and different interfaces support different speeds, usually external interfaces have, and the built-in interfaces are now generally SATA Note: 1GB s=1024MB S, 1MB S=8MB S, uppercase b is byte translated as byte, equal to 8 units lowercase b, bit), so theoretically, the external mobile hard disk will be slower than the internal hard disk.

There are also other interfaces, such as Apple's Thunderbolt connector (10GB s), which is a little faster than the built-in one.

3. So, under normal circumstances, the read speed of ordinary hard disks is higher, and there can be at least a difference of 20mb s.

This is slightly different according to a maker

You check if the hard disk has any bad sectors, many tools on the Internet such as: 'Efficiency Source Hard Disk Bad Sector Detection Software' if there are bad sectors. It can be used for repair, and it can also be formatted with the formatting command that comes with Windows, not with a quick format (as if it should be used under DOS).

Hope it helps.