diff --git a/nixos/hosts/steamdeck/disks.nix b/nixos/hosts/steamdeck/disks.nix
index 17236cc8..3c49655c 100644
--- a/nixos/hosts/steamdeck/disks.nix
+++ b/nixos/hosts/steamdeck/disks.nix
@@ -47,5 +47,29 @@
         }; # partitions
       }; # content
     }; # disko.devices.disk.nvme0
-  }; # disko.devices
+
+    mmcblk0 = {
+      type = "disk";
+      device = "/dev/mmcblk0";
+      content = { 
+        type = "gpt";
+        partitions = { 
+          SD_CARD = { 
+            start = "0%";
+            end = "100%";
+            content = {
+              type = "btrfs";
+              extraArgs = [ "-f" ];
+              subvolumes = {
+                "/sd_card" = {
+                  mountpoint = "/sd_card";
+                  mountOptions = [ "compress=none" "noatime" ];
+                }; # sd_card
+              }; # subvolumes
+            }; # content
+          }; # partition 2 (SD_CARD BTRFS)
+        }; # partitions
+      }; # content
+    }; # disko.devices.disk.mmcblk0
+  }; # disko.devices.disk
 } # root