Assuming that you have put a new drive into your computer and that the old drive is still in your PC.

If so, open Windows Explorer, scroll down to the old drive.

Put your cursor on the file. Click and hold down the right-hand button on your mouse. Drag the mouse so that the cursor moves to the folder in your new drive where you want to store the file. Release the mouse button. From the pop up menu choose Copy Here or Move Here.

If you have several files which you want to move:
If the files are listed next to each other, click on the first file. Hold down the Shift key. Move the cursor to the last file. Click on the last file.

Put your cursor anywhere in the blue field that is created. Click and hold down the right-hand button on your mouse. Drag the mouse so that the cursor moves to the folder in your new drive where you want to store the file. Release the mouse button. From the pop up menu choose Copy Here or Move Here.

If you have several files in one folder that are not listed next to each other. Hold down the CTRL key while clicking on each file you want to move.

Then follow the drag and drop procedure described above.