LOL,
I just had a phone call with a guy named Geoffrey. He told me that DNS-325 has no operating system. And that they are sorry but cannot do anything about it, the folder was deleted (thank you, this is what I noticed and I called you for)
Good support.
So to recap. This piece of junk, DNS-325 has the transfer speed of a dial-up modem, has an USB port but you cannot connect a HDD to make backup and when you try to backup you files it crashes and deletes the folder you were trying to backup. What more can you ask from a network attached storage?