Check around before posting. Just a few posts down was
this question.
I have tried to move apps to external card. All I get is The device does not have a real primary external storage,
or the primary external storage is emulated.
Moving app to sd function cannot be supported by this device.
Rom Tool box says the same thing, moving to external not possible on this device.
My internal memory is approx 9GB free my external is approx 18GB free.
It also says system rom: 2.21 GB (297 MB free)
Internal and media: 11.8 GB (9.91 GB free)
I have just uninstall-ed around 20 apps, so I can now update the installed apps without problems.
Now I am going to re-install to see how far I get before it tells me "not enough space".
I have nearly triple the amount of apps on my galaxy S3 and never run out of space.
I just wanted to add. No problems with my 64GB SD card. I have 4500 music tracks on it as well as 4 movies and approx 2000 photos. All work without a hitch.