Google is your friend (unless you’re a taxpayer…)
https://www.google.co.uk/search?q=ssh+mac
If you had a power failure, the file system may be damaged, or even the hardware, depending on the nature of the power failure.
If the file system is damaged (beyond the ability of fsck to recover (which is what the drive does when the white light is flashing)), then it will probably not be able to mount /DataVolume,
I’m sure I recall someone getting a red light after unbricking, and managing to recover. There are a number of such discussions at this unbricking thread:
Now, I’M NOT saying this is your problem, but it may be worth considering if you can find no other answers. Note that some ‘solutions’ involve formatting the data partition; this will destroy your data, of course. I’d start with a 4-second reset, then a 40-second reset.
There are many threads about red led. Have a search.
https://community.wd.com/search?q=red%20led%20category%3A105
Here’s a recent one:
If you can access the Dashboard, then the network port is working, so that can be ruled out.
