Organizing files may require moving files from one folder to another. To do this you can right-click on any file, select cut from the menu, move to the folder you want the file moved to, and right-click > Paste the file.

Another option is to Drag and Drop the file. To drag and drop a file click on the file you want to move with left mouse button and hold it down. While you have the file selected you can drag this around your Desktop or Window.

When the file is where you want it, let go of the file (Drop) on the folder or in the location of your choice. This will move the file into that folder.

You can also try dragging files out of a folder onto the Desktop or from one folder to another.