Are your permissions in order? That is, you are attempting all of that from an admin account with read/write privileges? And the same is true of the drive on which the Desktop resides?
On a Mac since 1984. Currently: 24" M1 iMac, M2 Pro Mac mini with 27" BenQ monitor, M2 Macbook Air, MacOS 14.x; iPhones, iPods (yes, still) and iPads.
