You can finally attach an external hard drive disk (HDD) to your PlayStation 4 as part of firmware update 4.50. There's one thing you'll need to keep in mind before you take advantage of this feature, though: your external HDD must support USB 3.0. If it's a USB 2.0 drive, then it won't meet Sony's transfer speed requirements and won't work. Fortunately, this applies to most modern external HDDs.
You can connect a drive up to 8TB in size, so there's scope for lots of additional storage space here. In this guide, we're going to walk you through the process of setting things up. If you're looking for the best external HDDs for the PS4, then follow the link.
How to Attach an External HDD to Your PS4
Here's how you can connect an external hard drive to your PlayStation 4:
Connect Your External HDD to Your PS4
First up, plug your external HDD into your PS4 and power it up if needs be.
Format Your Extended Storage
From the PS4 home screen, go to Settings > Devices > USB Storage Devices. If everything's plugged in and powered up, then the PS4 should detect your external HDD. Click 'Format As Extended Storage' but please keep in mind that this will wipe all of the data from your external drive, so make sure you've got everything backed up before proceeding.
Use Your Extended Storage
When the process is complete, your external HDD will become the default location for downloads from the PlayStation Store. If you've got games stored on your PS4's internal hard drive that you want to copy across, then from the PS4 home screen go to Settings > Storage and browse your applications. Click the Options button and select 'Move to Extended Storage' to copy things across.
How to safely disconnect your External HDD
If for whatever reason you need to disconnect your external hard drive from your PS4 then you should hold down the PlayStation button to bring up the Quick Menu and browse to Sound/Devices. Select 'Stop Using Extended Storage' and you'll be prompted when it's safe to disconnect.