Memory cards are collected from laptops. Refer to the list below to know their locations. You can buy Item Maps for each area which will reveal the location of Collectibles.
#1: Barbiturates Formula
Orphan Point Safehouse
#2: Benzodiazepine Formula
Welshore Wrecker's House
#3: Cocaine Formula
Amanaki Outpost, inside the safehouse.
#4: Crack Cocain Formula
Northview Gas safehouse
#5: Ecstasy Formula
Rust Yard safehouse
#6: Failed Drug Patent 1 Formula
Cliffside Overlook outpost safehouse
#7: Failed Drug Patent 2 Formula
#8: Failed Drug Patent 3 Formula
AM 12 safehouse
#9: GHB Formula
Hubert Shore Power outpost safehouse
#10: Heroin Formula
Broken Neck Home safehouse
#11: Ketamine Formula
Camp Murder safehouse
#12: Khat Formula
Kell's Boat Repairs safehouse
#13: Krokodil Formula
Nat's Repairs safehouse
#14: LSD-25 Formula
Lazy Marina safehouse
#15: Marijuana Formula
Bridge Control safehouse
#16: Meth Formula
Spine Ridge Site safehouse
#17: Mushroom Formula
Longshore View safehouse
#18: Opium Formula
North Krige Crest safehouse
#19: PCP Formula
Maw's Repairs outpost safehouse
#20: Spice Formula
Satellite Communication Hub safehouse