Dear Friends
Please do not update your Samsung Galaxy on 7 phone for software update because this update will be a great problem in your phone and your will start hanging. All Applications and Pic, Songs from SD card will be automatically moved out to Systems memory which can not be moved to SD card again by any way. So your all data will not be in use and yours applications also will not support to your command.
Please be aware of this otherwise you will be in a great trouble.Thank you