FLASH MEMORY CAPACITY DESCRIPTION: The amount of memory marked on the storage device. The capacity recognized on the device used vary. This is calculation difference between manufacturer and your PC. The specific memory conversion can refer to the following table. ABOUT REAL CAPACITY: 128GB=110GB-120GB data storage: 128GB USB 3.0 high-speed data transfer performance. Plug and play: No need drive/power supply only plug in. A-class chip: Can be erased repeatedly for 100,0000 times. Support computer systems,Can not support system. Writing speed: 10-20Mb/s , Reading speed: 40-70Mb/s.The rate of performance depends on the different operation system available and various flash adopted, so the speed maybe different. Color: Black Material: plastic Package Contents: 1 x 4-in-1 USB flash drive Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.