Use an Ethernet Cable or Turn Off All Other WiFi Devices
First thing’s first, you can always just start with the basics. Before you immediately start tinkering with your PS4’s settings, you may want to try out some simple solutions that could still make a meaningful difference. If your PS4 is currently connected to the internet via WiFi, the first change you can make is to swap out the wireless connection for an ethernet cable. It’s a simple, age-old piece of advice for gamers that can occasionally get overlooked. If you are already using an ethernet cable but download speeds are still troubling, try unplugging the ethernet cable and plugging it back up. Keep in mind, however, that some gamers have reported corrupted game files as a result of this method although so far it seems to be an extremely rare occurrence.
If you are adamant about using WiFi or just have no way to make an ethernet connection possible, you will need to make sure your PS4 is getting all the attention it deserves. When you’re downloading a new game or update file, be sure to disconnect as many devices as possible from the WiFi. Unless you have a premium router with the Quality of Service feature or Beamforming, this will be mandatory to squeeze the most out of your WiFi when downloading large files on your PS4.
