Most computer enthusiasts and people that work on lots of computers for fun or at work have bunches of HDDs, SSDs, and optical drives that are too old to really be used in a new machine and still work so you might not want to just trash them. If you have some of this gear around and want to easily, be able to use it if needed NewerTech has a new adapter just for you.
That is assuming you have a USB 3.0 port on your computer. The adapter is called the USB 3.0 Universal Drive Adapter. It takes any SATA HDD or SSD and allows it to be used on the PC via USB 3.0 port. The adapter also has IDE ribbon connectors.
Those ribbon connectors will let you take older 5.25-inch optical drives and use them via the USB 3.0 port. That would be a great way to get an optical drive on your notebook that lacks one. The adapter is available right now for $39.99.