This video shows where the Memory Cards are from 1 to 23, many cards appear only after receiving the letter and for this you need to pump your reputation and go to sleep in the shelter (many letters come only after rest).
0:02 - Memory Card # 1 - Frame Arms: Byakko - Find on a rock a few meters southwest of the Point west of the Capital Node.
1:09 - Memory Card # 2 - Frame Arms Girls: Byakko - You'll find it behind the Wind Farm.
2:07 - Memory card # 3 - Frame Arms: Kagetora - At the Ozerny junction, move east to the city walls and there you will find a truck, next to which lies the card.
3:13 - Memory Card # 4 - Frame Arms: Genbu - Find at the foot of the satellite dish building just southwest of the Weather Station.
3:46 - Memory Card # 5 - Frame Arms: Mingwu - Find in a small tunnel at Mom’s lab.
4:54 - Memory Card # 6 - Kotobukiya Ludens Girl Model - On the hood of a truck, right at the entrance to the Distributor north of the Mountain Junction.
5:44 - Memory Card # 7 - Prime 1 Studio 1/2 Scale Ludens Statue - Head north from the Mountain Junction until you reach the metal posts on a snowy plateau. A memory card will lie between them.
6:51 - Memory Card # 8 - Sentinel 1/6 Ludens Action Figure - In the cave halfway between the nodes of the Doctor and the Photographer.
7:33 - Memory Card # 9 - Max Factory Ludens figma - This memory card is located on the shore of Crater Lake near the South Node. It can be found at the southern end of the coast near the wreckage of the city, inside the perimeter of the South Node.
9:02 - Memory Card # 10 - Good Smile Company Nendoroid Jumbo Ludens - Inside the Edge Node at the very end of the elevator / terminal room.
9:48 - Memory Card # 11 - Christina - From the Elders' node, we head down the cliff in a northeast direction to find a memory card lying at the foot of the mountain.
10:43 - Memory card # 12 - Godzilla - Located at the Mountain Junction, in a tar hole next to the object. The card cannot be obtained upon first arrival at this site. Access will open in episode 6 when the pit is empty.
11:47 - Memory Card # 13 - Walk - On the top of the mountain next to the First Survival node. Appears only after pumping a reputation with him. As you level up, you will receive an email from First Survivor with the headline "Food tastes better when you're high!". Only after reading this letter will a memory card appear! Get some sleep in your private room to receive new emails after maximizing your reputation.
12:37 - Memory card # 14 - Stay with me - At the top of the Crematorium west of the Lake Node at one of the small bridges leading to the large chimney. Appears only after pumping the Point north of the Mountain Knot. As you level up this facility, you will receive an email from Charles Khan with the headline "Something Glowing in the Crater ...". Only after reading this letter will a memory card appear! Get some sleep in your private room to receive new emails after upgrading your reputation.
13:46 - Memory card # 15 - Large fish - On the roof of cargo containers inside the Port hub.
14:49 - Memory Card # 16 - Night of Fear - A little west of the Ruined Refuge (outside the crater), next to the water near a small rock.
15:45 - Memory card # 17 - Attack of the mushroom people - Southeast of the Elders' node and north of the Director's node. In this place there is a large cluster of cryptobiotics with a tall Cryptobiotic tree. Next to it lies a memory card.
16:56 - Memory Card # 18 - Seven Samurai - In a cave leading to the MUL camp to the south or the Distributor west of the Central Node.
18:08 - Memory Card # 19 - Bridge over the Kwai River - A river flows between the Temporal Farm and Mom’s Laboratory. In the middle of the river is a broken bridge. On the western side of the bridge is a memory card.
19:30 - Memory Card # 20 - Dr. Strangelove - From the Hartman Lab, head southwest to the heart-shaped lake. You can find it on the south coast, where the two halves of the heart connect.
20:46 - Memory card # 21 - Shell carving - MUL camp, south of the Lake Node.
21:27 - Memory Card # 22 - Glasscraft - To the east of the Master’s site is the MUL camp, and to the north of it is the point where the road was built. On the ridge there is a small depression where the memory card lies.
22:50 - Memory card # 23 - Coffee cup - In the camp of MULES north of the Temporal farm. In one of the tents, where the MULOV mailbox is standing nearby.