time capsule usb drive wont mount
Hi folks, after my 2020 MBPro updated Catalina supplemental update 19H524 yesterday I can no longer mount the USB drive attached to my Airport Time Capsule. It shows up as a disk option in Time Machine preferences, and is listed in the Finder window for the Time Capsule. When double-clicked to open the error message says "the operation can't be completed because the original item can't be found". The internal TC drive does mount. The USB drive can be mounted on all my other computers with various versions of MacOS. I searched around for various permissions with no luck. Any ideas?
MacBook Pro 13″, macOS 10.15