Why 2 TB Hard Drive Shows 1.81 TB in Windows

 

1 GB is 1024MB

Why Toshiba external disc show 1.81 TB equal to 2.000.396.832.768 bytes?

The reason for this discrepancy lies in how storage capacity is marketed and calculated.

When manufacturers market storage devices like external hard drives, they often use the decimal system (base 10) to calculate capacities. 

In the decimal system, 1 terabyte (TB) equals 1,000 gigabytes (GB), 1 gigabyte equals 1,000 megabytes (MB), and so on.

However, computers use binary arithmetic (base 2) to calculate storage capacities. In the binary system, 1 terabyte (TB) equals 1,024 gigabytes (GB), 1 gigabyte equals 1,024 megabytes (MB), and so forth.

So, when you convert the capacity of 1.81 TB to bytes using the binary system, you get a slightly different number compared to the decimal system that the manufacturer uses for marketing. 

The actual storage capacity in bytes is calculated as follows:

1.81 TB * 1024 GB/TB * 1024 MB/GB * 1024 KB/MB * 1024 B/KB = 1,953,870,863,616 bytes.

This value is very close to the number you provided, 2,000,396,832,768 bytes. 

The difference between these two numbers could be due to the way storage is formatted and partitioned on the drive, as well as the space reserved for system files and formatting overhead.

Why Toshiba hard drive 2 TB is 1.81 TB
https://youtu.be/J02RpyuzOSw