There is some capacity missing from 1 TB and 2 TB

WD External Drives WD Portable Drives
1

Hello,

I have purchased two new WD hard drives, one of them has 1 TB, and the other has 2TB.

However, when I plugged them to my commuter, I saw that  there are about 69GB missing from 1TB HD.

However, there are about 194.56GB (0.19TB) missing from 2TB.

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2

It’s got someting to do with the formatting. The sizes are about right. Sometimes there is data on a virtual CD and that is subtracted from the total.

Joe

3

I know there are some files inside each drive, but I don’t think the size o these files will be about 194Gb or 69GB. Have you had  look at my screenshots?

4

There are two issues at work here. One, as Joe said, is that partitioning and formatting the drives consumes some space. The other is that HDD manufacturers specify that a terabyte is 1,000,000,000,000 bytes. This is a correct use of the term terabyte in base ten. However, Windows displays drive space in sizes which are powers of two, based on one kilobyte being 1024 bytes. Consequently, a megabyte is 1024 times 1024, or 1,048,576 bytes. A gigabyte multiplies by 1024 again, which equals 1,073,741,824 bytes. Finally, a terabyte is 1024 times that, or 1,099,511,627,776. When these numbers are translated they yield the reduced amounts you are seeing.

In fact, the terminology has changed, such that the terms Windows is using are incorrect. The current terms for the powers of two values are-

  1. kibibytes, instead of kilobytes
  2. mebibytes, for megabytes
  3. gibibytes, for gigabytes
  4. tebibytes, for terabytes

This Wiki page explains the basis for this difference-

https://en.wikipedia.org/wiki/Kibibyte

The imprecise use of these terms causes all sorts of misunderstandings!