depending on how you have it configured you should be able to use CIFS, webdav, sharepoint, ftp or nsf
i would guess cifs is your best bet but you will have to configure the server name and verify the authentication/security type is either alfresco or enterprise depending on which version of alfresco you are using
I believe it is 3 lines of configuration.
I have noticed alfresco can get a touch unstable when moving many many small files but even local usb drives do the same thing.
I would probably suggest smaller chunks at a time