Help/Support transfering big files

[karanjs 12 iPad Air 12.4.8]

i googled it turns out my systemm storage is full how do i clear that i did install icleaner it only increased my system storage how do i do it my system storage

[mitosis 4.2k iPod Touch 5G 7.1.1]

You might have lots of pics that need deleting or you might have some apps that take up storage, check it from the settings 

[karanjs 12 iPad Air 12.4.8]

but it shows in system settings 4 gb available 

[mitosis 4.2k iPod Touch 5G 7.1.1]

Then try to do it now, and google the updated error

[mitosis 4.2k iPod Touch 5G 7.1.1]

@karanjs Update?