punta ka messaging, then yung "my folder". usually madami nakasave dyan na pics, music at videos passed thru bluetooth. check mo din files sa gallery, anything na walang drawing ng mmc sa tabi, it means sa phone memory nakasave yun.

also check the "manager" (not file manager) for installed apps in the phone memory. delete mo na lang yung di kailangan or you can reinstall it sa miniSD..

kung ayaw pa din, copy all your important data sa mmc..then do a master reset.