This article explains how to replace the hard drive in your PS4 without losing your game data.
How to Replace PS4 Hard Drive Without Data Loss?
The standard PlayStation 4 hard drive only has 500GB, which is at best enough space for about a dozen modern games. Upgrading your hard drive will allow you to store more content and ensure that your system runs at peak performance for years to come. Learn how to upgrade your PS4 hard drive without losing any games saved on your console.
Since Sony doesn't make hard drives specifically for the PS4, your first step is to find a compatible hard drive. The PS4 comes with a hard drive, but you can also install a solid state drive if you prefer. SSDs are typically much faster, but they can be less durable and are also more expensive.
Your best option is to purchase a hard drive from a company like Seagate, which makes hard drives optimized for the PS4. That said, any 2.5" laptop hard drive no thicker than 9.5mm should be fine; if you're going to the trouble of replacing your PS4 hard drive, you might as well upgrade to at least 1 or 2TB.
