diff --git a/include/m_Do/m_Do_MemCardRWmng.h b/include/m_Do/m_Do_MemCardRWmng.h
index 63b833ce7..e102c0872 100644
--- a/include/m_Do/m_Do_MemCardRWmng.h
+++ b/include/m_Do/m_Do_MemCardRWmng.h
@@ -1,10 +1,40 @@
 #ifndef M_DO_M_DO_MEMCARDRWMNG_H
 #define M_DO_M_DO_MEMCARDRWMNG_H
 
+#include "d/d_save.h"
 #include "dolphin/types.h"
 
 typedef struct CARDFileInfo CARDFileInfo;
-struct mDoMemCdRWm_HeaderData;
+
+struct mDoMemCdRWm_HeaderData
+{
+    /* 0x0000 */ u8 banner[0x0e00];
+    /* 0x0e00 */ u8 icon[0x0200];
+    /* 0x1000 */ u8 field_0x1000[0x0c00];
+    /* 0x1c00 */ char comment[32];
+    /* 0x1c20 */ char info[32];
+};
+
+struct card_pictdata
+{
+    u8 data[0x1ffe];
+    u16 csum;
+};
+
+struct card_gamedata
+{
+    u8 data[dSv_save_c::PACKED_STRUCT_SIZE];
+    u64 csum;
+};
+
+struct card_savedata
+{
+    u32 saveCount;
+    u32 dataVersion;
+    card_gamedata gamedata[3];
+    u32 field_0x1658[0x269];
+    u32 csum;
+};
 
 s32 mDoMemCdRWm_Store(CARDFileInfo*, void*, u32);
 s32 mDoMemCdRWm_Restore(CARDFileInfo*, void*, u32);
diff --git a/src/d/d_save.cpp b/src/d/d_save.cpp
index 3e97c2d50..c8e1aa6c4 100644
--- a/src/d/d_save.cpp
+++ b/src/d/d_save.cpp
@@ -7,6 +7,7 @@
 #include "d/d_save_init.h"
 #include "d/d_com_inf_game.h"
 #include "d/d_item_data.h"
+#include "m_Do/m_Do_MemCardRWmng.h"
 #if VERSION == VERSION_JPN
 #include "d/d_s_play.h"
 #endif
@@ -1626,13 +1627,8 @@ BOOL dSv_info_c::isActor(int i_id, int i_roomNo) {
 
 /* 8005E780-8005EA24       .text memory_to_card__10dSv_info_cFPci */
 int dSv_info_c::memory_to_card(char* i_cardPtr, int i_dataNum) {
-    // The size of the dSv_save_c struct in RAM (i.e. with alignment padding) is 0x778.
-    // The size that gets stored to the memory card (i.e. packed, without the padding) is 0x768.
-    // At the end of this function there's a check to ensure it doesn't copy more than 0x768 bytes.
-    // At the start of this function, the size the index gets multiplied by to find the slot in the card is 0x770.
-    // I'm not sure where 0x770 comes from, but my best guess is that it's 0x768 aligned to the next 0x10 bytes.
     char* buffer_start;
-    char* buffer = i_cardPtr + i_dataNum * ALIGN_NEXT(dSv_save_c::PACKED_STRUCT_SIZE, 0x10);
+    char* buffer = i_cardPtr + i_dataNum * sizeof(card_gamedata);
     buffer_start = buffer;
 
     memcpy(buffer, dComIfGs_getpPlayerStatusA(), sizeof(dSv_player_status_a_c));
@@ -1723,7 +1719,7 @@ int dSv_info_c::memory_to_card(char* i_cardPtr, int i_dataNum) {
 /* 8005EA24-8005ED00       .text card_to_memory__10dSv_info_cFPci */
 int dSv_info_c::card_to_memory(char* i_cardPtr, int i_dataNum) {
     char* buffer_start;
-    char* buffer = i_cardPtr + i_dataNum * ALIGN_NEXT(dSv_save_c::PACKED_STRUCT_SIZE, 0x10);
+    char* buffer = i_cardPtr + i_dataNum * sizeof(card_gamedata);
     buffer_start = buffer;
 
     memcpy(dComIfGs_getpPlayerStatusA(), buffer, sizeof(dSv_player_status_a_c));
@@ -1810,7 +1806,7 @@ int dSv_info_c::card_to_memory(char* i_cardPtr, int i_dataNum) {
 /* 8005ED00-8005EF88       .text initdata_to_card__10dSv_info_cFPci */
 int dSv_info_c::initdata_to_card(char* i_cardPtr, int i_dataNum) {
     // TODO: This function could probably be cleaned up somehow
-    char* buffer = i_cardPtr + i_dataNum * ALIGN_NEXT(dSv_save_c::PACKED_STRUCT_SIZE, 0x10);
+    char* buffer = i_cardPtr + i_dataNum * sizeof(card_gamedata);
     char* buffer_start = buffer;
     char* buffer_src;
 
diff --git a/src/m_Do/m_Do_MemCardRWmng.cpp b/src/m_Do/m_Do_MemCardRWmng.cpp
index 5498d8582..761ffe6ca 100644
--- a/src/m_Do/m_Do_MemCardRWmng.cpp
+++ b/src/m_Do/m_Do_MemCardRWmng.cpp
@@ -15,36 +15,6 @@
 #include <string.h>
 #include <printf.h>
 
-struct mDoMemCdRWm_HeaderData
-{
-    /* 0x0000 */ u8 banner[0x0e00];
-    /* 0x0e00 */ u8 icon[0x0200];
-    /* 0x1000 */ u8 field_0x1000[0x0c00];
-    /* 0x1c00 */ char comment[32];
-    /* 0x1c20 */ char info[32];
-};
-
-struct card_pictdata
-{
-    u8 data[0x1ffe];
-    u16 csum;
-};
-
-struct card_gamedata
-{
-    u8 data[0x768];
-    u64 csum;
-};
-
-struct card_savedata
-{
-    u32 saveCount;
-    u32 dataVersion;
-    card_gamedata gamedata[3];
-    u32 field_0x1658[0x269];
-    u32 csum;
-};
-
 static u8 sTmpBuf[0x2000] ALIGN_DECL(32);
 static u8 sTmpBuf2[0x2000] ALIGN_DECL(32);
 static u32 sSaveCount;