Here's How to Free Up Space On Your PS4 to Install Final Fantasy VII Remake – Gizmodo, Gizmodo.com
Don’t play Overwatch anymore? Get rid of it. The goal is to free up as much space as possible.
Get more storage
If you’re not willing to part with any installed games, look into an external HDD. There are many inexpensive ones that can hold terabytes of data and plug right into your PS4 via USB. You can pick up a pocket-sized WD Elements 1TB external HDD on sale for $ 64, or a 5TB version for double that. If you don’t need something that tiny and don’t mind an external HDD with a power adapter, Seagate has some excellent large-capacity drives, and you can usually get 6TB for around $ .
Install games in order of size
If you just got a PS4 or want to start with a clean HDD, install the games that take up the most space first. That way you lessen your chance of running into that infamous “not enough free space error,” and you’ll have five times the amount of space needed for Final Fantasy VII Remake From there, install the rest of the games you want in order of decreasing size. If that’s still not enough, then consider getting an external drive.