The portable hard drive is 80G, and I have 74 56G left after formatting, how do I restore to 80G

1.Many hard drives have less actual capacity than the total capacity. In the design process, the actual capacity will be reduced due to errors, space utilization, and other reasons.

2.When formatting, take a quick format, which will cause the usable capacity to decrease, it is better to wait for him to be fully formatted.

3.When neither of the above two is the case, it means that you have bought a fake!!

This is normal.

Manufacturer computing 1G 1000MB

The system compute is 1G 1024MB

80g x 1000 x 1000 x 1000/1024/1024/1024=

The normal 80G hard disk size is 80*1000M 1024=, plus the addition and subtraction of the hard disk manufacturer (generally minus) becomes so big-

It's normal, not that there's something wrong with your hard drive.

That's normal. I have 230 left of 250g hard drive. 20 less! Nothing.

Manufacturer 1g = 1000m, and our concept 1g = 1024m

In fact, this is caused by the difference in capacity algorithms, the capacity algorithm in the computer is 1MB=1024KB, but the algorithm of the manufacturer of hard disks is 1MB=1000KB

Your situation is normal, don't worry.

It's a very normal phenomenon, don't be nervous!

The hard drive manufacturer's definition of hard disk capacity is different from the operating system's algorithm for hard disk capacity, resulting in an error between the disk identification capacity and the actual capacity displayed in the operating system.

The standard of hard disk manufacturers: 1GB = 1,000MB, 1MB = 1,000KB, 1KB = 1,000byte

Operating system algorithm: 1GB = 1,024MB, 1MB = 1,024KB, and 1KB = 1,024byte

A 40GB hard drive is calculated as follows:

Hard disk manufacturer's standard: 40GB = 40,000MB = 40,000,000KB = 40,000,000,000byte; Operating system algorithm: 40GB = 40,960MB = 41,943,040KB = 42,949,672,960byte The capacity of a 40G hard drive shown in the operating system is:

An 80GB hard drive is calculated as follows:

Hard disk manufacturer's standard: 80GB = 80,000MB = 80,000,000KB = 80,000,000,000byte; Operating system algorithm: 80GB = 81,920MB = 83,886,080KB = 85,899,345,920byte; The capacity of the 80G hard drive shown in the operating system is:

Taking a 160GB hard drive as an example, the calculation is as follows:

Moreover, after partitioning and formatting, the system partition table will also occupy some space on the hard disk, so it is normal for the total capacity displayed by the operating system to be different from the model capacity of the hard disk.