Why Hard Disks & Pen Drives Have Less Space ?

Here's why Hard Disks and Pen Drives Have Less Space Than The Promised Space.

Pen drives, hard disks go under the class of USB flash drive. It is an information stockpiling gadget with an incorporated USB interface which consists flash memory.At present, pen drives and external hard disks have been part just like smartphones. But have you ever checked that the pen drives storage capacity is different to that of the promised space by the manufacturer?

Yes, the storage room contrasts without a doubt. For instance, let us take a 8 GB pen drive and when it is connected to your PC you can see that only 7.46 GB space is accessible.



Then where is the rest of 0.54 GB ? Scratching your head and cursing the manufacturer? Well, let me try to explain you .

A simple of math involved in this. Generally, every one of us knows that computers work using number 2 as the base. According to this the memory management will be :

1 KiloByte (KB) = 1024 Bytes
1 Mega Byte (MB) = 1024 Kilo Bytes (KB)
1 Giga Byte (GB) = 1024 Mega Bytes (MB)
8 GB = 1024 * 8 = 8192 MB

But pen drive and hard disks manufacturers consider it as base 10. i.e
1 KiloByte (KB) = 1000 Bytes
1 Mega Byte (MB) = 1000 Kilo Bytes (KB)
1 Giga Byte (GB) = 1000 Mega Bytes (MB)
8 GB = 1000 * 8 = 8000 MB ( approximately equal to 7.81 GB)

and the rest of the memory (approximately 0.35GB ) is reserved for data sector and system files for better performance.

As the device memory capacity increases, we lose more amount of space. The table below shows some significant figures.


Well the truth is that, manufacturers are actually not cheating anyone in this whole thing. In fact, they mention this on the box of hard disks and pen drives. Take a close look at your hard disk boxes.



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