Measurements

1 byte=8 bits
1 kilobyte(kb)=1024 bytes
1 megabyte(mb)=1024 kilobytes or ~1,000,000 bytes
1 gigabyte(gb)=1024 megabytes or~1,000,000,000 bytes
1 TERABYTE (TB)= 1024 gigabutes or ~1,000,000,000,000 bytes
1 petabyte (pb)=1024 terabytes or~1,000,000,000,000,000 bytes