for example 500gb yung hard disk mo tapos dalawa partition na tig 250, naging isang partition na 500gb ba sir o 250 tapos nakatago yung isa? kung ganun nangyari sir try mo disk management (right click my computer/manage/disk management) usually unallocated partition nakalagay dun sa nireformat mo, yun kasi nangyari sakin. pwede mo yun dun i reformat