Be better at identifying multi disc releases not under a common folder

Be better at identifying multi disc releases not under a common folder such as:

Z:\Horace Silver\Retrospective
Z:\Horace Silver\Retrospective (Disc 2)
Z:\Horace Silver\Retrospective - Disc 3
Z:\Horace Silver\Retrospective -Disc 4

Perhaps use metadata at early stage to help decide if two folders are part of same release or not.