If your Windows 10 PC is connected to the same local network as the My Cloud then see the following post that has several suggested things to try when it comes to Windows 10 settings and the inability to see devices on the local network.
Also make sure to use the same workgroup name for both the My Cloud and the computers on the local network.
Check the computer’s firewall/security software as certain firewall/security software settings may block access to local network devices like the My Cloud.
As a troubleshooting step try accessing the My cloud using the My Cloud’s IP address.
Twonky is a DLNA media server. It has its issues but is a functional media server for streaming supported content. See the MY Cloud User Manual for more information on Twonky supported streaming media.
