Resolving Operating System Storage space in Android
Operating system sometimes occupy large storage of the internal memory. pictures and videos takes too much space in smartphones even if pictures and videos are automatically uploaded to Dropbox, Google plus or other cloud service.
Users often think that why do they also take such a large storage on device. Gallery application in android is not synced to Google Plus, they are backed up on cloud service. This means that Gallery does not deletes least recent used pictures to save space.
Other solution would be to root the device. Basically rooting the mobile phone will give user permission different operations on phone.
Rooting allow to remove some of the pre-installed applications which are not used frequently. Integrate update of pre-installed apps, some of these pre-installed applications including Google applications such as Gmail, Play Store, Chrome etc. receive an update at a later stage of time. When they get updated, their old version doesn't get removed. They are still taking up space. After rooting user will be able to integrate the update so that older copies get actually replaced by new versions.
Many apps can be moved to SD card. After rooting, user will be able to move any application to sd card. This problem also occurs due to old application data of apps which have not been uninstalled properly from mobile phone.