PS4 bought new world fine, cannot download out of space message received.

My Son has bought a new world, but when we try to download it, an error message appears saying that there is not enough space on the PS4.

The phsycial PS4 has over 100GB of free space.

Within Minecraft the storage bar in the worlds screen is less than half full.

If I go into Minecraft -> Settings -> Storage these are the current worlds and templates he has

Worlds - 3.8GB (51 Items)

World Templates - 922.1Mb (28 Items)

Resource Packs 35.2Mb (3 Items)

Cached Data 0.07Mb (1 Item)

 

I am guessing there is an internal limit within minecraft for storage space used? Please help as my Son has speant his own money on this new world and cannot even play it?