Computers store data using 0’s and 1’s, known as binary. Each 1 or 0 is known as a bit. When storing data (e.g. RAM or SSD) it is stored in groups of 8 bits, known as a byte. 1000 bytes is a kilobyte (kB), 1000kBs is a megabyte (MB), 1000MBs is a gigabyte, 1000GBs is a terabyte. While some storage actually stores 1024 we do not need to be that detailed in this course.
While all primary and secondary storage stores data in bytes, network speed is measured in bits – so a 50Mbps (megabits per second) network connection is actually storing 6.25MBps (megabytes per second).