You should start out with 2 seperate windows open.
Position the 2 windows on different sides of your desktop.
Highlight all the files you want to move by left clicking at the top of the window and dragging the cursor to the bottom of the files that you want to move.
Then right click and drag the files to the other window and release. A menu will appear, then select "copy here" and, you have moved your files.
Tip: you can also use the "cut and paste", or the "copy and paste" functions to do this.
If you want to do either, all you do is, highlight the files you want to move and then move the cursor over the highlighted area and right click and a menu will appear. You can then select "Cut" or "Copy" and then go to the area or other window and right click there and select paste, and the file should appear.
Tip: When you select "Cut", the selected files will be moved. If you select "Copy" the selected files will be copied and will exist in both places.
Happy file moving. :-)