how much data can a gQR store?
The amount of data that can be stored in the QR code symbol depends on the datatype (mode, or input character set), version (1, …, 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). Numeric: 7,089. Alphanumberic: 4,296. Binary/byte: 2,953. Kanji/kana: 1,817.