You can move a file or folder in two ways, depending on whether you're moving a file or folder on the same drive or between two different drives. To move a file or folder between folders on the same drive, do the following:
Click the Finder icon on the Dock. The Finder window appears.
Open the folder that contains the file or folder you want to move.
Click the file or folder you want to move. (Hold down the key to click and select multiple files and folders.)
Drag the selected file(s) or folder(s) over another folder on the same drive (either inside the right pane of the Finder window or over a folder in the sidebar) and wait until the Finder window opens the contents of that folder. Keep holding down the left mouse button.
Move the mouse pointer over the folder in which you want to move the file(s) or folder(s), and then release the left mouse button when the Finder highlights the appropriate folder.
To move a file or folder between two different drives, rather than copy it, you must hold down the key while dragging the item between the drives. (If you don't hold down the key, you'll copy the file or folder instead of moving it.)
To move a file or folder from one drive to another drive, do the following:
Click the Finder icon on the Dock. The Finder window appears.
Open the folder that contains the file or folder you want to move.
Click the file or folder you want to move. (Hold down the key and click to select multiple files and folders.)
Hold down the key and drag your selected file(s) or folder(s) over the receiving drive in the sidebar of the Finder window. Wait a few seconds until the Finder window opens the contents of that drive. Keep holding down the left mouse button.
Move the mouse pointer over a folder and wait a few seconds until the Finder opens that folder. Repeat this for each additional folder you want to open.
Release the left mouse button and the key when the Finder highlights the folder where you want to move your selected file(s) or folder(s).