I was wondering about this as well as whether there is a size limit for the files for individual tracks. With the latest download (and also the HiFiBerry Digital Pro download) the library scan is stopping at 200 artists and just over 500 tracks. I have about 1TB of files on a Synology NAS. Raspberry PI 3 and HiFiBerry Digi Pro.
In particular I have some Allman Brothers tracks that are over 1GB and a couple that are over 2GB. I was kind of wondering whether the issue came up when the scan encounters these files, so I moved them out of the scanned NAS folder and I still hang at approximately the same spot. Any suggestions as to what to look at?
btw, other than this library issue which appears in both versions, the Digi Pro version is working well and sounds really good into my PS Audio Directstream DAC.