Introduction to Computers,Programs & Java (part 2) The storage capacity

Storage device

1. Every memory device has a storage capacity.

2.The storage capacity (example,256 MB,1GB,2GB etc ) indicates the number of bytes it can hold.

3.Computer data is using binary system that consists of ones and zeros in a string or line.

4. Each string has eight set of binary number (zeros and ones) that we call them as bits.Meaning,1 string = 8 bits.

5. 8 bits = 1 Bytes 

6.Example,00000100 = 1Byte

7.1 Byte = 1 Character.

8.Example,the capital letter "K" is expressed in binary system as 01001011.

9.1 Bytes is the smallest amount of transfer.

10.Example,a Gif image with 4 kB,equal to 4 kilo bytes (4000) bytes.Meaning,it has 4000 thousand set of string,with 8 bits each string.Example :

00000001

00000010

00000100

00001000

.

.

.

.

.

 (until 4000 strings)

Hence,4000 strings (bytes) x 8 bits = 32,000 thousands of bits (0 and 1) for single gif image.

11.Do remember that,KB = Kilo Byte and Kb=Kilo bits.

12.A kB is 8 times larger than kb.Why,kb = 1000 bits,while kB = 1000 (00000000).

13.Mathematically,1 kB = 1000 bytes.Actually, 1 kB is not equal to 1000,but 1024.This is because,mostly computer memory used traditional measurement instead of modern measurement aka SI units aka Metrix system.


14.See below,traditional and modern measurement:

Figure 1 : indicates the traditional measurement that widely used in memory system.

Figure 2 : the green marks indicate the traditional measurement.While white marks indicate the SI standard that we commonly used in life.

Hence,
15.1kb/kilo bits /Kbps = 1024 bits = 128 bytes 
16.1024 bytes = 1 kilo bytes
17.1024 kilobytes = 1MB
18.1024 MB = 1 GB
19.1024 GB = 1 Tera Bytes