how does it work?(the commands,processing etc...)

If you haven't found out already from somewhere then:

binary is the language computers use

bits are in binary which is made of 1's and 0's

so a bit = a 1 or 0

so 4 bits = 4 1's or 0's

1= on and 0= off

so wth 4 bits (all of) you would have 0000

a byte is 8 bits and a kilobyte (KB) is 1024 bytes

in counting you would go(with 3 bits for example) 000 001 010 011 100 101 110 111

with binary there are special numbers (2 4 8 16 32 64....)

these are special because 1 bit has 2 possible values(0 and 1), 2 bits has 4 (00 ,01 ,10 and 11) ,3 bits has 8 (000 ,001, 010 ,011 ,100 ,101 ,110 ,111) and so on.....

hope I helped answer your question(sorry if I made it sound more complex than it was and confessing things(I am good at doing that))

 if I made a mistake then someone please correct me as this was all(but the spelling of kilobytes) was from memory and may be wrong.