Fixing the "The device where the music files are stored may not be powered on" error.
In a recent thread I described the issue I’d faced since “The Update” that prevented me from adding my music library, hosted on a Mac Mini, to an S2 system. I had file sharing configured per Sonos recommendations (even before the update), and although Sonos could connect to the share it would fail during the indexing process with this incredibly informative error message: O RLY? TL;DR: If you encounter the above error, it may be an issue with the cumulative volume of metadata in your music library, despite that not having been an issue before the May update. This certainly affects shares stored on MacOS using libraries managed with Apple Music, although I will note that I do not believe this represents an issue with Apple's products, as it's clearly linked to a data limit within Sonos. However, it’s one you’re more likely to encounter if your music management approach, like Apple Music, involves naming files with proper names, rather than a simple disc-track numbering system. Troublesh
