Deep Thoughts

Whenever I put the data DVD into my PS3, that is the only folder I cannot access for some reason. All other files come out just fine (except for the remixes, but I imagine that would be solely computer-based). As the D-drive in my computer doesn't work (I'll get it fixed when I stop being lazy) could anyone tell me how many/what kinds of videos are stored in that folder? And does it need to be accessed solely via computer? Thanks.