Can't copy anything to my hard drive
I'm trying to drag folders off my desktop and add them to my hard drive but it won't let me. I am the only user on my lap top and I am listed as the administrator in the users and groups but when I look at the hard drive it says I am 'read only'. Any attempt to change this and I get - "The operation can’t be completed because you don’t have the necessary permission'. Also, when I look at the hard drive it lists 'system' (not my name) as read/write but when I look at the files on my desk top it lists my name as read/write. I also a not allowed to create a new folder inside the hard drive. Any suggestions .... ?
MacBook Pro 16″, macOS 14.1