My samsung galaxy s4 mini won't download the new software update that is available. My phone currently has 582MB available on device memory and 423MB on the SD card. When I click update, it says 'Unable to download software update (521.04MB). Not enough space in device storage or SD card. Delete some items' I have deleted many items and it still comes up with the same message each I try to update. I am a bit confused at why it continues to say this, please help!