The latest versions of MacOS cannot copy directly to the Uniti Core Storage - a security feature’ (Hah!) that I have found no way to disable.
To copy files to the Core’s storage, you MUST;
- Mount the Core’s disk on the Mac desktop, which can be done using Guest credentials.
- You may then Create A New Folder on the Core’s Downloads folder, eg with the album name as its title.
- You can then copy the album files from the Mac to the folder you have created on the Core.
This is described fully elsewhere in the Forum, search is your friend.
ATB, J