Macbooks are great and I use mine all the time but I do not like the amount of space I get to save all my data. I use an external HDD to save all the large files but still, with all the installations, 250 GB is not a lot of space. To compound this problem, I have iTunes copying files to my main hard disk everytime I create a playlist.
The good news is that there is an easy solution to this.
If you go to your itunes settings > advanced
and uncheck the ‘Copy files to iTunes Media folder when adding to library’ option.
You can ensure that the files are not being copied to the media library by selecting one of the song / video in your playlist and pressing cmd+shift+R all at once. This shows you the location of selected file in finder.
Hope that helped.