If you've been using an old gaming PC that uses a traditional hard disk for storage, or if you're just completely new to PC gaming, then you need to know that buying an SSD (solid state drive) is one of the simplest ways to give a rig a healthy upgrade. They're extremely reliable these days and you can grab a seriously fast one, with bags of capacity, for relatively little money.
There are lots to choose from, which is great for keeping prices in check, but tricky to know which one to get.