Hi Bob
Thank you for your suggestions and help. I have also talked with Apple support for ideas and, as usual, they were great to talk with and offered suggestions. I don't need more storage, just backup for my Mac "in case".
I am not a techie, so this is challenging for me. I just want to have the backup, preferably as similar to the Time Capsule as possible. I had a separate wifi address for my Time Capsule and would, every 2 weeks or so, connect to that Time Capsule wifi address and set the Mac to backup to the Time Capsule during the night. Perfect...
I was recommended to look at a Western Digital "MyCloudHouse" machine for a new backup. However, after reading about it, I think it requires a connection directly into my wifi router. I'm a bit paranoid about outsiders intercepting or accessing my data (hence I prefer not to use the cloud) and so a direct connection to my wifi router is a bit concerning to me.
Any additional observations or suggestions are welcome.
Thanks,
M