MBP harddrive problem

Hey guys,

I have a problem with my MBP that I've owned for about 2.5 years now. It came with a 320gb HD and my problem is, that it's almost always full, and to be honest I have no idea with what. This may sound stupid, but when I go to 'my files', I put 90% of the stuff there on my external hard drive (thus songs, movies etc) but that doesn't seem to be what takes up space in my HD. When I go to 'info about this mac' and then storage, it says that 201 GB is used by 'other', how can I find what those 'other' files are? It's driving me crazy because my laptop is running kinda slow when I work in Final Cut X and I think this is due to all the stuff that is on my laptop.

How can I find out what takes up all that space?

My MBP has an 2.66 GHz Intel Core 2 Duo processor, 4GB 1067, 320 Gb HD and runs on Mac OS X Lion.

Thanks for any help!
Fabien

 

that helped! Thanks so much!

Fabien