NAS Volumes Disconnect During Scan in Retrospect 9 or higher for Macintosh Posted yesterday at 01:03 AM · Report reply Doug_M, Upgraded to Retrospect Mac 16 from what version? As I've said in the third paragraph of this post in another thread, "my impression from several recent Forums threads is that the 'backup server' Engine—which is the same for both variants of Retrospect aside from GUI—lost its ability in version 15 to handle certain old versions of network protocols used by NASes." Pleas look again at the fifth paragraph in the boilerplate Support Case post I linked to earlier in this thread. Retrospect Tech Support may no longer give you personalized support, since your installation upgraded more than 45 days ago, but they've probably got a generalized response they can send you if you file a Support Case about the bug—which as I said in that fifth paragraph you're entitled to do. Besides, they may take pity on you because the updating was done over the New Year break—probably by ignoramuses from IT management.🤣 To enhance that pity I suggest you contact Retrospect Sales by phone, and threaten to procure another backup application to backup your live production server. In the meantime, and to enhance the credibility of your threat to Sales, I suggest you put another Mac or Windows machine—running the older version of Retrospect that used to work—into service backing up your production NAS.