jimbo…the copy/paste or drag/drop routines are pretty neat. Do an internet search on the topics…lots of youtube or sites available. I’m guessing that you are copying files/folders from a PC tree structure and want to save-as a copy for backup or just to move the files/folder to your external HD. I’m also guessing that you are not using or planning to use a Backup program on that drive or to the cloud.
I usually open another Explorer window using a Cntl key and N letter which produces another window. You can then configure each window to point to your PC folder and the Folder/location on the HD drive. Now you can copy (rt mouse select) and move over to 2nd window and paste (rt mouse select) to where ever you want. If you want it in a new folder, you must first create it.
For drag/drop you would press the left mouse and hold while you drag it to the 2nd window…releasing the mouse will drop the item…like I said before, this is tricky because you can sometimes drop it into a folder that you were not aware that it did or lose track of it…Copy/Paste is much safer!