I can no longer access any files that are on the two external drives connected to my Mac Mini

[BlackJack]

Are these affected drives possibly NTFS formatted?

Roon Stopped Recognizing NTFS HDD after OS Monterey upgrade [Ticket In]

Hello All, While we have a ticket in progress regarding this, found a temporary workaround on how to restore access. There is an NTFS driver for Mac called Tuxera, that once installed, should allow you to regain access to your NTFS drives in Roon: While this isn’t an ideal solution, it can be helpful while we work on this issue.