Is your internet connection not very reliable or is there another reason why you are off the grid? Do you need the files all in one geographical location or do you move them around? The new HNC phone will let you sync a limited number of tracks to it and it will support MQA.

Cheers
Tom

Main: G61SL, 218, HD621, 2*7200SE, 7200HCSE, M6s, DSW, Apple TV 4K, NUC (Roon server)
Secondary: Wiim Pro, 3200, Audio Core 200
F80