Bits, Bytes and nibble

Nibble = 4 bits
2x nibble = 1 byte (8 bits)
Kb = Kilobit = 1000 bits = 125 bytes
Mb = Megabit = 1000 Kb

KB = Kilobyte = 10^3  = 1,000
MB = Megabyte = 10^6 = 1,000,000
GB = Gigabyte = 10^9 = 1,000,000,000
TB = Terabyte = 10^12 = 1000 GB

Ki = Kibibyte = 2^10 = 1024 bytes
Mi = Mebibyte = 2^20 = 1,048,576
Gi = Gibibyte = 2^30 = 1024 Mi
Ti = Tebibyte = 2^40 = 1024 Gi