Apple MacBook (13-inch, Mid 2010) - Manual (Page 37)

37 Chapter 3 Boost Your MacBook
Replacing the Hard Disk Drive
You can upgrade the hard disk drive in your MacBook. The hard disk drive is located
next to the built-in battery when you open the back of your MacBook. The replacement
drive must be a 2.5-inch drive with a Serial ATA (SATA) connector.
Important: Apple recommends that you back up the data on your hard disk drive
before removing and replacing it. Apple is not responsible for any lost data.
To replace the hard disk drive in your MacBook:
1 Shut down your MacBook. Disconnect the power adapter, Ethernet cable, USB cables,
security lock, and any other cables connected to the MacBook to prevent damaging
the computer.
WARNING: The internal components of your MacBook can be warm. If you have
been using your MacBook, wait 10 minutes after shutting down to let the internal
components cool before continuing.