When you normally delete files, either by dragging them to the Trash, using a system or contextual menu, or by using the Command-Delete hot key, OS X will move the file to the Trash where it will wait ...

We’ve all done it before — moved a file into the Recycle Bin, and then pressed the Empty Trash button. Later, we found out that that was an important file that you needed to keep, but now it’s gone ...