There are two possible ways to copy data from hdfs to local filesystem:
1. bin/hadoop fs -get /hdfs/source/path /localfs/destination/path
2. bin/hadoop fs -copyToLocal /hdfs/source/path /localfs/destination/path
You can also download the file from hdfs to local filesystem. Just, point your web browser to HDFS WEBUI(namenode_machine:50070) and select the file and download it.
Hope this will help.