Here is a useful unix script that can be used to find large files that are taking up disk space
find <search_path>/ -type f -size +<min_file_size>k -exec ls -lh {} \; | awk '{ print $8 ": " $5 }'
Example: find all files recursive under /home/dave larger than 1GB
find /home/dave/ -type f -size +1000000k -exec ls -lh {} \; | awk '{ print $8 ": " $5 }'