If I set up backup nas as target and bring it in office it works (the Synology just uses rsync and listens on 873) If I bring backup nas home and forward port 873 to outside and tell master nas to ...

I’m a new Synology owner. I picked up the DS1522+. I have 5 HDs in it and I’d like to backup the contents onto a single USB drive (if that’s the best / most recommended way to do it). I bought a ...