I had some problem while enabling the FS full access with my Samsung ATIV S (OS version 8.0.10211.204).
Here are the steps I followed:
1 - first dev unlock and then interop unlock the device
2- I installed the SamWP8 Tools and I turned on the Full FS access
3 - I followed the suggestions that can be found on the various forum's threads but still I can't get access to the phone's disk (the disk seems to be empty)
Just a side note: I'm working with a Windows 7 OS and I'm virtualizing a Windows 8.1 pro + WP8 SDK - this should be a problem, since I can sideload xaps without any error.
Can someone please assist me with the solution of the issue?
Thanks in advance.
** Update ** I solved the issue by upgrading the OS from GDR1 to GDR2, following @MauzaoFilho and @Randοm Hero's suggetions - the device first downloads and installs the GDR2 than, if you want, it will allows the uprade to the GDR3. Thanks for the help.