I have several libraries with the music files stored on a Synology NAS. The majority of albums are in flac format with separate tracks but a few were ripped as a single flac file with cue sheet. All have the album front image embedded (usually a 500x500 pixel image). The largest library is for Classical music with approx 39K files (643GB) - this takes about 30 min to scan. Although I usually stream the music through a Wiim Ultra using MInimserver, I find Musicbee extremely useful in checking the tagging, creating playlists and rating tracks (I use the portable version of Musicbee on a PC with Windows 10). Using BubbleupNP and the Musicbee UPNp plugin I can also configure Musicbee to play through the Wiim.