diff --git a/Source/Core/Core/HW/EXI/EXI_Device.cpp b/Source/Core/Core/HW/EXI/EXI_Device.cpp
index 0d3ba0f8f9..21b5a49313 100644
--- a/Source/Core/Core/HW/EXI/EXI_Device.cpp
+++ b/Source/Core/Core/HW/EXI/EXI_Device.cpp
@@ -15,6 +15,7 @@
 #include "Core/HW/EXI/EXI_DeviceMemoryCard.h"
 #include "Core/HW/EXI/EXI_DeviceMic.h"
 #include "Core/HW/EXI/EXI_DeviceModem.h"
+#include "Core/HW/EXI/EXI_DeviceSD.h"
 #include "Core/HW/Memmap.h"
 #include "Core/System.h"
 
@@ -162,6 +163,10 @@ std::unique_ptr<IEXIDevice> EXIDevice_Create(Core::System& system, const EXIDevi
     result = std::make_unique<CEXIAgp>(system, slot);
     break;
 
+  case EXIDeviceType::SD:
+    result = std::make_unique<CEXISD>(system);
+    break;
+
   case EXIDeviceType::AMBaseboard:
   case EXIDeviceType::None:
   default:
diff --git a/Source/Core/Core/HW/EXI/EXI_Device.h b/Source/Core/Core/HW/EXI/EXI_Device.h
index db74306df0..d108ed5b13 100644
--- a/Source/Core/Core/HW/EXI/EXI_Device.h
+++ b/Source/Core/Core/HW/EXI/EXI_Device.h
@@ -42,6 +42,7 @@ enum class EXIDeviceType : int
   EthernetTapServer,
   EthernetBuiltIn,
   ModemTapServer,
+  SD,
   None = 0xFF
 };
 
@@ -88,7 +89,7 @@ std::unique_ptr<IEXIDevice> EXIDevice_Create(Core::System& system, EXIDeviceType
 
 template <>
 struct fmt::formatter<ExpansionInterface::EXIDeviceType>
-    : EnumFormatter<ExpansionInterface::EXIDeviceType::ModemTapServer>
+    : EnumFormatter<ExpansionInterface::EXIDeviceType::SD>
 {
   static constexpr array_type names = {
       _trans("Dummy"),
@@ -106,6 +107,7 @@ struct fmt::formatter<ExpansionInterface::EXIDeviceType>
       _trans("Broadband Adapter (tapserver)"),
       _trans("Broadband Adapter (HLE)"),
       _trans("Modem Adapter (tapserver)"),
+      _trans("SD Adapter"),
   };
 
   constexpr formatter() : EnumFormatter(names) {}
diff --git a/Source/Core/Core/HW/EXI/EXI_DeviceSD.cpp b/Source/Core/Core/HW/EXI/EXI_DeviceSD.cpp
index e69de29bb2..aebf91c417 100644
--- a/Source/Core/Core/HW/EXI/EXI_DeviceSD.cpp
+++ b/Source/Core/Core/HW/EXI/EXI_DeviceSD.cpp
@@ -0,0 +1,49 @@
+// Copyright 2020 Dolphin Emulator Project
+// Licensed under GPLv2+
+// Refer to the license.txt file included.
+
+#include "Core/HW/EXI/EXI_DeviceSD.h"
+
+#include <string>
+
+#include "Common/CommonTypes.h"
+#include "Common/Logging/Log.h"
+
+namespace ExpansionInterface
+{
+CEXISD::CEXISD(Core::System& system) : IEXIDevice(system)
+{
+}
+
+void CEXISD::ImmWrite(u32 data, u32 size)
+{
+  INFO_LOG_FMT(EXPANSIONINTERFACE, "EXI SD ImmWrite: {:08x}", data);
+}
+
+u32 CEXISD::ImmRead(u32 size)
+{
+  INFO_LOG_FMT(EXPANSIONINTERFACE, "EXI SD ImmRead");
+  return 0;
+}
+
+void CEXISD::DMAWrite(u32 address, u32 size)
+{
+  INFO_LOG_FMT(EXPANSIONINTERFACE, "EXI SD DMAWrite: {:08x} bytes, from {:08x} to device", size,
+               address);
+}
+
+void CEXISD::DMARead(u32 address, u32 size)
+{
+  INFO_LOG_FMT(EXPANSIONINTERFACE, "EXI SD DMARead: {:08x} bytes, from device to {:08x}", size,
+               address);
+}
+
+bool CEXISD::IsPresent() const
+{
+  return true;
+}
+
+void CEXISD::TransferByte(u8& byte)
+{
+}
+}  // namespace ExpansionInterface
diff --git a/Source/Core/Core/HW/EXI/EXI_DeviceSD.h b/Source/Core/Core/HW/EXI/EXI_DeviceSD.h
index e69de29bb2..ac41307b65 100644
--- a/Source/Core/Core/HW/EXI/EXI_DeviceSD.h
+++ b/Source/Core/Core/HW/EXI/EXI_DeviceSD.h
@@ -0,0 +1,31 @@
+// Copyright 2020 Dolphin Emulator Project
+// Licensed under GPLv2+
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <string>
+
+#include "Common/CommonTypes.h"
+#include "Core/HW/EXI/EXI_Device.h"
+
+namespace ExpansionInterface
+{
+// EXI-SD adapter (DOL-019)
+class CEXISD final : public IEXIDevice
+{
+public:
+  explicit CEXISD(Core::System& system);
+
+  void ImmWrite(u32 data, u32 size) override;
+  u32 ImmRead(u32 size) override;
+
+  void DMAWrite(u32 address, u32 size) override;
+  void DMARead(u32 address, u32 size) override;
+
+  bool IsPresent() const override;
+
+private:
+  void TransferByte(u8& byte) override;
+};
+}  // namespace ExpansionInterface
diff --git a/Source/Core/DolphinQt/Settings/GameCubePane.cpp b/Source/Core/DolphinQt/Settings/GameCubePane.cpp
index 806e0c7840..9d38cb78f7 100644
--- a/Source/Core/DolphinQt/Settings/GameCubePane.cpp
+++ b/Source/Core/DolphinQt/Settings/GameCubePane.cpp
@@ -135,7 +135,7 @@ void GameCubePane::CreateWidgets()
   // Add slot devices
   for (const auto device : {EXIDeviceType::None, EXIDeviceType::Dummy, EXIDeviceType::MemoryCard,
                             EXIDeviceType::MemoryCardFolder, EXIDeviceType::Gecko,
-                            EXIDeviceType::AGP, EXIDeviceType::Microphone})
+                            EXIDeviceType::AGP, EXIDeviceType::Microphone, EXIDeviceType::SD})
   {
     const QString name = tr(fmt::format("{:n}", device).c_str());
     const int value = static_cast<int>(device);