1.5G. 800,000 data files have ten million, data size of 1.5G, an integer is two bytes, a single-precision decimal is four bytes, double-precision decimals are eight bytes, the character is a byte, the data is calculated to be 1.5G. data (data) is the result of facts or observations, is the logical induction of the objective, is used to represent the objective of the raw material unprocessed. Data is the expression and carrier of information. Data is the expression and carrier of information, which can be symbols, text, numbers, voice, images, video and so on.