Market place (English)

I can't downloas add-ons (or any other item) from the market place that contains more than ~4Mo. I if try to download an item that is more than 4Mo, I will have the "not enough place in your playstation 4 system" error message. I have the place on my play station, I have more than 3 To. I already tried to refresh the shop's cache, it doesn't work.