the amount of storage available on a hard disk drive is measured in
Hard disk drive The total capacity of HDDs is given by manufacturers using SI decimal prefixes such as gigabytes (1 GB = 1,000,000,000 bytes) and terabytes (1 TB = 1,000,000,000,000 bytes).[91] This practice dates back to the early days of computing;[93] by the 1970s, "million", "mega" and "M" were consistently used in the decimal sense for drive capacity.[94][95][96] However, capacities of memory are quoted using a binary interpretation of the prefixes, i.e. using powers of 1024 instead of 1000.
QR code The amount of data that can be stored in the QR code symbol depends on the datatype (mode, or input character set), version (1, â€¦, 40, indicating the overall dimensions of the symbol), and error correction level. The maximum storage capacities occur for 40-L symbols (version 40, error correction level L):[5][45]