Hi there this is Justin Imhoff from Akron Ohio and I just had that problem to where it said that I wouldn’t be able to download it but I had a USB drive stick in one of my USB ports and so I took the initiative to go to the main menu on the main screen and I had to go to the SETTINGS and then I went to the DEVICES and then I went to USB STORAGE DEVICES and then I went to the part where it says to stop using the USB stick and then I went back to the main menu on the PS4 and then I click on the POWER and then I went to the POWER OPTIONS and then I click on TURN OFF PS4 and then I waited for it to turn all the way off and then I turned the PS4 back on and then I went to SETTINGS on the main menu and then I click on the SYSTEM SOFTWARE UPDATE and then I click on it and it went through so make sure that you don’t have anything plug in your USB PORTS and then it will download cos I did that and it downloaded on my PS4 so now I have the new SYSTEM SOFTWARE UPDATE of 7.55 on my PS4