diff --git a/Runtime/CMemoryCardSys.cpp b/Runtime/CMemoryCardSys.cpp
index 3ffc92acf..c8fdd042f 100644
--- a/Runtime/CMemoryCardSys.cpp
+++ b/Runtime/CMemoryCardSys.cpp
@@ -354,6 +354,19 @@ ECardResult CMemoryCardSys::MountCard(kabufuda::ECardSlot port)
     return result;
 }
 
+ECardResult CMemoryCardSys::UnmountCard(kabufuda::ECardSlot port)
+{
+    kabufuda::Card& card = g_CardStates[int(port)];
+    if (CardResult err = card.getError())
+    {
+        g_OpResults[int(port)] = err;
+        return err;
+    }
+    card = kabufuda::Card();
+    g_OpResults[int(port)] = ECardResult::READY;
+    return ECardResult::READY;
+}
+
 ECardResult CMemoryCardSys::CheckCard(kabufuda::ECardSlot port)
 {
     kabufuda::Card& card = g_CardStates[int(port)];
@@ -553,4 +566,10 @@ ECardResult CMemoryCardSys::FormatCard(kabufuda::ECardSlot port)
     return ECardResult::READY;
 }
 
+void CMemoryCardSys::CommitToDisk(kabufuda::ECardSlot port)
+{
+    kabufuda::Card& card = g_CardStates[int(port)];
+    card.commit();
+}
+
 }
diff --git a/Runtime/CMemoryCardSys.hpp b/Runtime/CMemoryCardSys.hpp
index 30a390b16..250df948d 100644
--- a/Runtime/CMemoryCardSys.hpp
+++ b/Runtime/CMemoryCardSys.hpp
@@ -145,6 +145,7 @@ public:
 
     static kabufuda::ProbeResults CardProbe(kabufuda::ECardSlot port);
     static ECardResult MountCard(kabufuda::ECardSlot port);
+    static ECardResult UnmountCard(kabufuda::ECardSlot port);
     static ECardResult CheckCard(kabufuda::ECardSlot port);
     static ECardResult CreateFile(kabufuda::ECardSlot port, const char* name, u32 size, CardFileHandle& info);
     static ECardResult OpenFile(kabufuda::ECardSlot port, const char* name, CardFileHandle& info);
@@ -161,6 +162,8 @@ public:
     static ECardResult FastDeleteFile(kabufuda::ECardSlot port, int fileNo);
     static ECardResult Rename(kabufuda::ECardSlot port, const char* oldName, const char* newName);
     static ECardResult FormatCard(kabufuda::ECardSlot port);
+
+    static void CommitToDisk(kabufuda::ECardSlot port);
 };
 
 }
diff --git a/Runtime/CMemoryCardSysWin.cpp b/Runtime/CMemoryCardSysWin.cpp
index a9fcafa46..71aef432e 100644
--- a/Runtime/CMemoryCardSysWin.cpp
+++ b/Runtime/CMemoryCardSysWin.cpp
@@ -1,5 +1,6 @@
 #include "CMemoryCardSys.hpp"
 #include <shlobj.h>
+#include <sys/stat.h>
 
 namespace urde
 {