Home Network

Good morning,
Not long joined this forum and with little Linux knowledge.
Reading through the various postings, I've noticed that access to the STB file structure is sometimes desirable/necessary.
How do I link my Zero box to my PC?
I'm using Devolo units at home. The PC, laptop, TV and STB are all connected to the internet.
Thanks.

Good afternoon,
Yes, all was going well until a change in the host name. I went on holiday and switched off my Devolo mains units. When I switched on again, I had a different host name.
Using FTP protocol, user name "root" and a blank password, I get "access denied" with Win SCP.
With DreamboxEdit, the IP test is OK but the name/password test fails.
At the STB, network test is all green ticked.
The image is BH, latest version.
Any ideas?

Sorry guys - I'm stupid. Rebooted the STB and all is OK again.