Fenix 8 Pro Amoled reads " Storage Limit Reached"

While trying to load 1 audiobook (283.6 MB) through Garmin Express My Music on my new Fenix 8 Pro AMOLED (with13.7 GB Free Space), I get a pop-up window reading " Storage Limit Reached." "The following files could not be sent because your Fenix 8 Pro-51mm has reached its storage limit.

Software Version: 23.39

Please help!