Harddrive has less storage than promised
We buy a new harddrive or pen drive and find that it has less storage space than what was mentioned on the box do you know the reason for it if ?
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The answer is that the manufacture considers 1 Megabyte to be 1000 Kilobytes, 1 Gigabyte to be 1000 Megabytes, 1 Terabyte to be 1000 Gigabytes and so on. This is correct considering that kilo means 1000 and mega means 1000000 (10^6). However, computers calculate on base 2 and to them, 1 MB is actually 1024 kilobytes, 1GB is 1024MB and 1 TB is 1024GB. This difference in the method of computation is responsible for this "missing space."
Consider a 500 GB harddisk:
From a manufacturer's point of view, the 500GB will have 500*1000*1000*1000 = 500000000000 bytes.
From a computer's point of view, 500GB is actually 500*1024*1024*1024 = 536870912000 bytes.
Hard drive that promises to have 500 GB storage space will actually display 465.66GB, 536870912000-500000000000 = 36870912000 bytes (34.34GB) less storage space when connected to a computer
100GB hard disk displays 93.13GB when connected to a computer
250GB displays 232.83GB
500GB displays 465.66GB
1TB displays 931.32GB
2TB displays 1862.64GB
Increase in capacity of storage increase in missing space
Source:Google
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