My wife has a Kobo Aura H2O she hasn't used in a while, and it has been a few years since I have transferred any books to it from Calibre. I am currently running Calibre 4.15 on macOS Catalina 10.15.3.
I have the KoboTouch (2.5.1) plugin enabled as well as KoboTouch Extended, and have tried using KoboUtilities to switch between the two drivers. Nothing I've tried has allowed Calibre to detect the connected device. I can't figure out what has changed, as this worked just fine the last time I attempted to connect the device to Calibre.

Any advice would be greatly appreciated!
Thanks,
mdclanahan
EDIT: It might also be important to note that the Kobo is running firmware 4.20.14622 (8bb853a72a, 3/13/20). The device mounts in macOS but does not mount in Calibre.