External drives are a popular way to increase a Mac's storage capabilities. External drives are available with so many options and configurations that it can be difficult to figure out what you need for your Mac.
This guide runs down available external storage options. It also includes a link to our popular DIY guide for building your own external drive. Of course, buying or building is a decision only you can make, but this guide will give you all the background information you need to make a logical choice.