The VirtualBox Guest additions are installed in the VM which should enable
drag & drop of files, but perhaps it's having issues with the size of the
files? SSH should also be running so scp is another option, as is a Shared
Folder. You'll need to get the file to be visible from the VM's filesystem,
perhaps unzip them at that point, and then you can use 'hadoop fs
-copyFromLocal' to put them in HDFS.