Sorry, guys i seems that once ou have reflashed the MIUI ROM everthing works fine :)))))))))))))) Just to update that this version DOES WORK WITH A 64-GB EXTERNAL CARD :D
Im new to MIUI, so im not sure if I need to Install the rom first for the Galaxy s3 internatioinal version, and then install the GApps, after i have installed it? Or can I not install the GApps at all?