I had a more detailed explanation in mind, but for simplicity...
I use 'save as' for the first file, give it a new name, choose file type and a folder destination.
Then I will click on the second file to have it as the active window, and choose 'save all files'.
Now the destination folder will be default, and if you name each files with ascending numerical names at the start, they will stay in the order they are created.