Delete older than..
Find directories and delete recursively
find /path/ -mtime +7 -type d -exec rm -rf {} +
Find files and delete recursively
find /path/ -mtime +7 -type f -exec rm -rf {} +
find /path/ -mtime +7 -type d -exec rm -rf {} +
find /path/ -mtime +7 -type f -exec rm -rf {} +