Two 64GB capacities and USB 3.2 Gen 1 speeds of 220 MB/s read and 100 MB/s write Measurements: 39 x 12.2 x 4.6 mm; weight: 5 g Storage temperature: -20°C to 85°C; operating temperature: 0°C to 60°C Guarantee and assistance Five-year guarantee with complimentary technical assistance Compatible with Chrome OS TM, Linux (version 4.4.x +), MacOS (version 10.15.x +), and Windows ® 11, 10