That too would work, you can get USB drive enclosures from local electronic or computer stores or Newegg or Amazon.
http
/www.newegg.com/Product/ProductList.aspx?Submit=ENE&N=100007705%20600006255&IsNodeId=1&name=2.5%22 - lists several that are available. It is a relatively simple process. Find the HDD drive bay underneath the laptop, remove the cover (usually just a couple of screws), you may have to remove a couple of more screws to remove the drive if it is in a caddy, disconnect the drives SATA and power connection (usually one connection for both). Installing the drive into the drive enclosure is simple as well. This video -
http
/www.youtube.com/watch?v=VZSP1jKyHE8 - will show you how. It shows and IDE drive but the directions are the same for a SATA drive. You can ignore the part about formatting the drive as it only applies to new drives.