Renaming Seagate external drives for iMac and Authenticate external drive

Thanks for the reply. Unfortunately, nothing happens when I move cursor over name and hit return.

Where is the Authenticate button?

I've figured out the changing of the name of a file. Still can't change the name of the remote disc.

I've been organizing many years of photos that have been on many external drives. I've moved them to the hard drive of my iMac. I've used 2 finder windows to organize files into folders that will make life easier to find something in years to come. Now the iMac is telling me that my start up drive is getting full.

I have a dedicated 3T Seagate hard drive attached to the iMac via USB - want to move organized photos to this drive.

A second 3T Seagate external drive is attached for Time Capsule backup - working well, no problem.

A third 1T Seagate is attached for a special photo project that I have been working on for years (no problem moving those files to this drive).

I want to move my organized pictures to the first drive so my iMac will continue to work fast. The first file that I want to drag and drop gives me the "Authenticate" message. I've checked - the file is not locked. Could the 3T Seagate hard drive be locked somehow? Do I need to do something to it so I can use only for an external hard drive, not an auto backup?

Not sure what you mean in your previous message about Remote Disc not necessarily a physical device. All 3 of my external drives are attached via USB. All three show up in the finder window under devices. Looking at the listing, there is a little "close icon" (arrow point upward with a line underneath) besides 2 of the external drives. The Remote Disc does not have this icon.