I've been using my hard drive for more than a year to back up my macbook. (OS X) Today I decided to store some movies in the hard drive, so I made a folder with movies in it. Then I read that it is good to partition my hard drive (250GB). I went to disk utilities and added a partition (50GB) for movies and images. Then I checked time machine to see if everything's ok, and now it seems like everything from the past disappeared. Is there anything I can do?