Starting with Mac OS X Lion (10.7) Apple decided to hide the Library folder within the User folder. It’s not gone, just hidden. Some crucial files like Mail accounts and iPhone backups get stored there, so there is a handy way to find the folder again.
To find the hidden library folder, go to Finder and click the Go menu at the top of the screen. You will see a list of folders. Now if you press the alt / option key on your keyboard you will see the hidden library folder appear. This is only a temporary way in, and you will have to press the key again next time. The folder remains hidden the rest of the time.
This is a video of a functional Toshiba laptop drive. Using a macro lens, we are able to see what happens when you read or write data to or from a hard drive. You can also see how the hard drive parks the heads off the disks when the power is shut off. This is to protect the hard drive from shocks during transportation.
It’s my first one of these videos so you can see my reflection in a couple of places, when I lean over to send different commands to the drive.