#1. After destroying the tower using the ceph Bolt Sniper, turn around check the hills to the northeast of the map. You'll find a datapad there.
Recording: The Skinning Trials
#2. After clearing the marsh of enemies, continue to the overpass. Here, you’ll hear Psycho mention about a CELL supply drop ahead. Head past the overpass and continue past the pond to spot to CELL troopers and a container. Open it to get a nanosuit module upgrade and a datapad on the ground.
Recording: Ceph Stage One
#3. Once you’ve reached the train yard, proceed to the north past the deployed turrets overhead. The datapad is found in the submerged maintenance tunnel under the tracks.
Ceph Colonization Stage One