Can't import ARD Plist

You shouldn't be using the Finder to copy over plist files from one location to another as doing very often 'mangles' the permissions associated with the file you're replacing. Applications referencing/using important files (such as property lists) expect certain permissions assigned to that file. If those permissions change the Application either can't use the copied file (which can potentially stop the Application from working properly) or the Application re-creates a file and its permissions it expects to be there. You really should use Terminal to do this sort of thing anyway which is something I can help you with. Quick question: where does the file you're trying to copy come from?

What happens if you try:

sudo cp -R /source volume/source file /destination volume/destination file

When prompted key in your admin password which you won't see being typed. Bur before doing the above issue this command first:

sudo ls -lae /Volumes/1TB\ EVO/Users/brandon/Library/Containers/com.apple.RemoteDesktop/Data/Library/Prefe rences/com.apple.RemoteDesktop.plist

The result should be something like this:

-rw------- 1 username staff 9922

issue the list command again after doing the copy to see if the permissions have been preserved. Beyond this and without being there all I can further suggest is there may be something else going on you're either not aware of or you've not mentioned. All I can tell you is on my unaltered/unmodified system it works as expected without the behaviour you're seeing.

The prefs file can get overwritten by cfprefsd. If you must copy a prefs file, quit the app first, move the file, then run `sudo killall cfprefsd` to prevent the replacement. If that doesn't work, try a hard-reboot (force power down by holding the power button for 10 seconds) before relaunching the app.