Solved Why does the Hard drive lost 18GB from 250GB show only 232G?

January 21, 2017 at 01:29:35
Specs: Windows 7
I format that the hard drive so many times
When I install new OS after format the drive the it shows only 232 GB what can I do

See More: Why does the Hard drive lost 18GB from 250GB show only 232G?

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January 21, 2017 at 02:58:59
The usable capacity of a 250GB hard drive after formatting is actually 232GB, this is normal, there is nothing wrong with your hard drive and you have not lost any space.

The difference between the manufacturers stated hard drive capacity and the capacity shown on your computer is caused by how drive manufacturers measure the capacity (1GB = 1000MB) and how Windows has always measured it (1GB = 1024MB).

For a 250GB hard drive, that difference amounts to 18GB.

Macintosh users do not have that problem because the Macintosh OS now uses the same capacity equation that the drive manufacturers use (1GB = 1000MB).

message edited by phil22

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January 21, 2017 at 07:35:02
phil22 is correct, and here's a link that explains it a little more in-depth:

"Channeling the spirit of jboy..."

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January 21, 2017 at 07:40:16
✔ Best Answer
There have been class action lawsuits brought against several HDD manufacturers for false advertising of HDD capacity.

If you multiply the advertised capacity by 0.9313, you'll have the true capacity.
250 x 0.9313 = 232.825GB
Imagine you had a 4TB HDD; 4000 x 0.9313 = 3725.2GB. You'd be shorted by almost 275GB!

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January 21, 2017 at 23:00:27
It's a power of 2 thing. Computer memory is all binary so it's reasonable to count it that way. 2^10 is 1024 and is the closest power of 2 to 1000 so that became the standard for a kilobyte. Then a megabyte is 1024 x 1024 bytes and a gigabyte is 1024 x 1024 x1024 bytes.

Both the binary and decimal counts should show under the drive's properties. I'm looking at an 80 gig drive's properties now and it shows a capacity of 80,015,491,072 bytes and 74.5 GB

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