I recommend using this: USB Drive
In this video I show you how to reinstall PS4 system software on PS4. This how to video will help you whether your PS4 system software got corrupted and you need to reinstall, if your PS4 hard drive went bad and you had to replace it, or if you are upgrading your PS4 to a faster SSD hard drive.
This tutorial will show you how to reinstall system software for your PS4. This can be necessary if you upgrade your system hard drive or have corrupted files.
Link to download: PS4 System Software
If you need help installing a new hard drive or replacing your existing hard drive on your PS4 check out my tutorial on how to do that here: