The Deciphering the Data quest in Arc Raiders is arguably one of the easiest they added with the new Cold Snap update, but you might still get tripped up by the second part of it. Initially, you'll have to head to the Spaceport and use the Magnetic Decryptor to interact with a terminal in Fuel Control. Easy enough, but after that terminal fails, you'll have to locate another in the Arrival Building, which is much more tucked away.
Feel free to bring a free loadout to this one considering you don't need to extract anything. Otherwise, here's how to complete Deciphering the Data and where to find the two terminals at which you can use the Magnetic Decryptor.
