Another option is to create a 'Greyhole Attic' Samba share.
More details about that here: https://github.com/gboudreau/Greyhole/wiki/AboutTrash
= Moving drives/data out of Greyhole =
Page: [[Greyhole moving data out of the pool]]
= Reference =
Good [http://revxatlarge.blogspot.com/2011/04/restoring-deleted-files-in-greyhole-and.html article] on Greyhole with terms explained.