It's totally bizarre! All my apps are fine, my home screens are fine, but all photos, music, and other files are gone.
My internal storage now only contains .android_secure and LOST.DIR, but the weirdest thing is the SD card. It contains all of the default and app folders that were previously on the internal drive, except without any of the user data (e.g. DCIM is empty where it should have photos & videos galore in there). However, the SD card does now contain 9 files called "FILL0", "FILL1"... through to "FILL9" and all of them are 1GB in size. These "FILL" files have no windows file extension.
Does anybody know what has happened here? It looks like the phone has suddenly taken all the internal data and copied it to the SD, while at the same time removing anything in any way precious to me and possibly storing it in these "FILL" files.
Can anybody make sense of this?