Right-click the first part and use 7-Zip or WinRAR to "Extract Here". This will merge them into a single .pkg file. : Format a USB drive or external HDD to exFAT .
Copy the extracted .pkg file directly to the root directory of the drive. : Connect the drive to your PS4.
The specific string UP0571-CUSA17246_00-HAMPRDC000000001 is the , which breaks down as follows: UP0571 : The publisher ID (Hamster Corporation).