From the site:
Note that this map comes in datapack form. Installation instructions are in the README.md file and in the trailer.
I've included the contents of the README below.
Download the datapack here.
Run the datapack with the following steps:
Open the "Create New World" menu in Minecraft Java Edition 1.16.5
Click the "Datapacks" ...
Alright, after a lot of head scratching, researching dead forums and reading a lot of documentation, I finally reached the conclusion that the game version was not the issue when it came to VaultMP.
It turns out that the Script Extender that came with VaultMP was for Fallout : New Vegas, and not Fallout 3. I needed to replaced New Vegas Script Extender with ...
and says I can’t format it as an extended storage
This usually means that the drive is dead, as it can't modify the partition table or partitions themselves.
You can try to check if the drive works by completely wiping it via diskpart on Windows. This Seagate KB Article should help.
If the drive does not works on your PS4 after you wipe it on diskpart, then ...