Why is my samsung s3 mini saying that I have no storage when I clearly have aload of space from deleting data; pictures, apps and music files?
You have to ensure that you have space in the internal memory of your phone, and not just on SD card. You can see it on Settings->Storage. If you have internal space, I recommend you install and run Ccleaner app. Otherwise, a radical solution will be a reset in your device. Don't forget to create a backup first!