Question

Why real size is less than actual size? means pen drive actual size is 8 GB but computer show real size is 7.48 GB.

Answer 1

In case of memory storage devices, the numbers indicate the space according to general metric system.

In metric system, 1K = 1000 = 10^3

But computers manage space taking 1K = 1024 = 2^10

That is, 1 KB = 1000 Bytes, and not 1024 Bytes which is how space is managed and shown in computers.

similarly,

1 MB = 1000 KBs = 1,000,000 Bytes

1 GB = 1000 MBs = 1,000,000 KBs = 1,000,000,000 Bytes

so, 64GB is actually 64,000,000,000 Bytes and not 68,719,476,736 Bytes as computers calculate and manage memory, in multiples of 1024 or 2^10

Therefore, actual storage space in a 64 GB pen drive is = 59.6046 GB

thankyou...