how to use:
safe way on version 2.5 is :
enable UMS Mode when cable usb is unplug
Back to Charge mode when cable usb is unplug
safe way on version 3.0 is :
do it on condition usb plugged
if you plug into player or some device player , and you found that it cannot found the USB drive
in this case just do this
settings -> connectivity -> usb connection type
and do press or repress the "Charge Only"
in version 3.0 you will notice 1 triangle on task bar, its normal , it telling you mass storage is currently unmount
2 icon on task bar is telling you the mass storage successful unmount you can take it out
those of notice are normal if we do unmount the mass storage in android api level.
all the information about how to do it i found on XDA forum.
i do some research also code this app
fix sometime fail to mount back to external_sd folder
fix sometime got to bluescreen on windows
fix bluescreen on windows
using different approach to unmount the external SD card
bring back native method to mount and unmount, its speed up abit when using native method
by check the box to enable native mode
support Jelly Bean
thanks are goes to XDA Members