diff --git a/configuration.nix b/configuration.nix
index 2d9b4a6..5a0b3af 100644
--- a/configuration.nix
+++ b/configuration.nix
@@ -97,6 +97,10 @@
   services.journald.extraConfig = "SystemMaxFiles=7";
 
   # Import other configuration modules
-  imports = [ ./modules/hardware-configuration.nix ./modules/networking.nix ];
+  imports = [
+    ./modules/hardware-configuration.nix
+    ./modules/networking.nix
+    ./modules/periodic.nix
+  ];
 
 }
diff --git a/modules/periodic.nix b/modules/periodic.nix
new file mode 100644
index 0000000..8348a34
--- /dev/null
+++ b/modules/periodic.nix
@@ -0,0 +1,13 @@
+{ config, lib, pkgs, ... }:
+
+{
+  # Idle HDDs when not used
+  systemd.services.hd-idle = {
+    description = "Idle HDDs when not in use";
+    wantedBy = [ "default.target" ];
+    path = with pkgs; [ hd-idle ];
+    script = "${pkgs.hd-idle}/bin/hd-idle";
+    serviceConfig.Type = "simple";
+    after = [ "shield-unit.mount" ];
+  };
+}