Hi all,
I had the storage issue and used the dialling method to free some space. This did free enough to update apps etc but I still wasn't happy with all that free space on the USB part.I decided to have a play without doing any "rooting" or hacks.
I discovered that I could manually move folders, such as Photographs, Videos and also some apps.
To do this you have to click on the "apps" icon from your home screen and look for the "my files" icon.
In MY FILES -
select ALL FILES
and you will see two folders - "extSdCard" and "sdcard0"
In the SDCARD folder you will find the sub folder for "usbStorage"
You can then browse through any folder you like. If you are happy that you want to move that folder, you simply select it and using the Top Menu either DELETE or MOVE - COPY - RENAME - DETAILS.
Select MOVE if you want to keep it and the go to the SDCARD folder and select the USBSTORAGE. You should have the option to "move here" at the top of the screen. Click MOVE HERE and job done. It takes a few minutes but it will be well worth the time.
I have managed to get an extra 1.5GB into my USB Storage from my other folders.
Take your time and your effort will be rewarded.