[vadblm]

For FreeBSD guests within VirtualBox please install emulators/virtualbox-ose-additions in the FreeBSD guest. They provide support for: Clipboard sharing Mouse pointer integration Host Time synchronization Window scaling Seamless mode

Чё-то ничего не пишут про shared folders...

[contoso.com]

угу. видимо это приговор.

With the "shared folders" feature of VirtualBox, you can access files of your host system from within the guest system. This is similar how you would use network shares in Windows networks -- except that shared folders do not need require networking, only the Guest Additions. Shared Folders are supported with Windows (2000 or newer), Linux and Solaris guests.

ссылка

[vadblm]

Остаётся только заводить сеть через мост и общаться с хостом через NFS