The remaining leaves / Flash Disk

People often do not know how much capacity is left "Flash Disk",plug in the computer always knows the amount of capacity,will gradually withered leaves process and flash drive with the capacity to do,leaves gradually turn yellow over time,squeeze Flash Disk it will slowly change color as the capacity of the amount of display has been used,each vein represents 10% of the amount of,see Flash Disk color to which the vein,Flash Disk will be able to know how much capacity is left,when the leaves are turning yellow, said flash drives have no capacity.