To update PS4 system software to latest version via USB flash drive,go to Google search, and type; “PlayStation software update”.
On the search results, click on any PS4 system software update link that emanates from www.playstation.com. In this case, search result 1 will suffice.
On the webpage, locate the latest PS4 system software update link, and download.
Locate the downloaded file, and rename to; PS4UPDATE.PUP, if necessary.
Insert USB flash drive into your laptop or desktop.
Open the flash drive and in it, create a folder named; PS4.
Next open this newly created PS4 folder, and inside it create another folder named; UPDATE.
Locate the downloaded PS4UPDATE.PUP file and place it inside the newly created UPDATE folder.
Now inside the flash drive we have the PS4 folder, inside the PS4 folder we have the, UPDATE folder and inside the update folder we have the PS4UPDATE.PUP file.
This is how the update file should be set up inside the flash drive for the console to recognize it.
Now insert the flash drive into your PS4 console and switch it on.
Log into your account.
Go to settings, then, system software update.
Your console automatically detects update software including the version it will be updating to, on USB flash drive,
then Click UPDATE and the wait for your console’s system software to update,
your console will restart during the update process.
After update is complete, you can confirm by going to SETTINGS, SYSTEM, SYSTEM INFROMATION. There you will see the new version it has updated to.
To watch video of the process, Click this link to video on my YouTube channel.