Support Problem Moving Apps To External SD Card

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http://androidforums.com – I bought a samsung galaxy mini 2 smartphone 2 weeks ago.I also bought an 8gb micro sdhc card. The device memory is 1gb and usb storage(internal sd card) is 2gb.But when i go to setting to application to manage apps and i press move to sd card, it moved but it still move to the usb storage.Now my usb storage is full and it always send me an error "sd card memory is full" but my external sd card still has 7gb. Is there way to move the apps to external sd card??????:( (General)