I have over 30k photos on my Mac (running macOS High Sierra V10.13.2). They are stored as Events (e.g. Summer 2015), making it very easy to quickly find an individual picture. I also have an iPad and iPhone 5, both with 64GB memory on which I store all my vital pictures (by selecting certain albums from my Mac when synchronizing). This ensures I have two back up devices.
However, within the last two weeks all my albums have disappeared from all three devices; all I have are the individual pictures (all 30k of them). Where have my albums disappeared to? There is no way I can recreate each album (even if I remembered all the names) and then copy the relevant pictures into each album - it would take years.
Can anyone help me recover the albums loaded with the pictures they contained?