Please choose the correct ending to complete the given sentence: Computers and Electronics: [header] How to change an imac hard drive [title] Backup your imac. [step] Before changing the drive on your computer, you should always backup your hard drive. You can backup your drive to a cloud service like icloud, or google drive, or you can backup your data to an external hard drive or flash drive.

Ending1: This will make backing up your drive much simpler. You can also save a backup file onto a usb flash drive, and then use the drive to uninstall your hard drive. Ending2: [substeps] Enable icloud to take up only a maximum of 8 gb of data. Disable icloud to only take up 64 gb of data. Ending3: You'll need a data backup service if you want to change the drive. For example, if you want to save a small amount of data to your hard drive, you can backup your hard drive to icloud or google drive. Ending4: [title] Power off your imac and unplug it. [step] You should always make sure your computer is unplugged and place it on a clean, static free surface.

Answer format: ending1/ending2/ending3/ending4