Installing Sims4 on a PC with no CD drive - from USB

@DarthJarJar808 Hey, you mention trying to copy files with a USB stick. This indicates you have a system with a CD drive, and you can move the files across. However you would need to install the game on the 2nd system.

I'm assuming the product code is already redeemed on your son's account? If not, do so now, and install Origin on the system with the CD drive. Log into your son's account and you should see The Sims 4 there. You can use the discs to install the game on this machine now, it should save on download time and data usage. There will be some patching/updates at the end so this could still take a while. 

Once it completes you can close Origin, then go to C:\Program Files (x86)\Origin Games (or wherever you installed to) and copy the whole The Sims 4 folder onto the USB stick. If there's not enough space you can move the components across piecemeal, as long as the folder winds up with the same contents after the transfer.

Now back on your son's system log into Origin and start the install. You can cancel this immediately, we just wanted the process to start so that it would create a default install path, which is usually C:\Program Files (x86)\Origin Games.

Within the Origin Games folder you can now overwrite the new The Sims 4 folder with the version from your USB stick.

Once this completes you can go to the games library in Origin, click "Origin" in the top left of the app then "Reload Page". There should be a quick install process and the game should be playable.