depends on what is you host/guest OS and Emulator.
* you can make samba/nfs share
* make shared folder (if guest supports this)
* make custom media (viftual image) mount it on your VM, make fs, write to it, and then umount it from VM, mount to host os, and copy to desktop....
*Upload to file sharing services...
*set up sever in VM and download file to host....
use your imagination