diff --git a/Source/Core/Core/WiiUtils.h b/Source/Core/Core/WiiUtils.h
@@ -6,10 +6,12 @@
 
 #include <cstddef>
 #include <functional>
+#include <optional>
 #include <string>
 #include <unordered_set>
 
 #include "Common/CommonTypes.h"
+#include "Core/IOS/ES/Formats.h"
 
 // Small utility functions for common Wii related tasks.
 
@@ -23,6 +25,16 @@ namespace IOS::HLE
 class Kernel;
 }
 
+namespace IOS::HLE::FS
+{
+class FileSystem;
+}
+
+namespace IOS::HLE::Device
+{
+class ES;
+}
+
 namespace WiiUtils
 {
 enum class InstallType
@@ -40,6 +52,18 @@ bool UninstallTitle(u64 title_id);
 
 bool IsTitleInstalled(u64 title_id);
 
+// Checks if there's a title.tmd imported for the given title ID.
+bool IsTMDImported(IOS::HLE::FS::FileSystem& fs, u64 title_id);
+
+// Searches for a TMD matching the given title ID in /title/00000001/00000002/data/tmds.sys.
+// Returns it if it exists, otherwise returns an empty invalid TMD.
+IOS::ES::TMDReader FindBackupTMD(IOS::HLE::FS::FileSystem& fs, u64 title_id);
+
+// Checks if there's a title.tmd imported for the given title ID. If there is not, we attempt to
+// re-import it from the TMDs stored in /title/00000001/00000002/data/tmds.sys.
+// Returns true if, after this function call, we have an imported title.tmd, or false if not.
+bool EnsureTMDIsImported(IOS::HLE::FS::FileSystem& fs, IOS::HLE::Device::ES& es, u64 title_id);
+
 enum class UpdateResult
 {
   Succeeded,

diff --git a/Source/Core/DolphinQt/GameList/GameList.cpp b/Source/Core/DolphinQt/GameList/GameList.cpp
@@ -452,8 +452,11 @@ void GameList::ExportWiiSave()
   QList<std::string> failed;
   for (const auto& game : GetSelectedGames())
   {
-    if (!WiiSave::Export(game->GetTitleID(), export_dir.toStdString()))
+    if (WiiSave::Export(game->GetTitleID(), export_dir.toStdString()) !=
+        WiiSave::CopyResult::Success)
+    {
       failed.push_back(game->GetName(UICommon::GameFile::Variant::LongAndPossiblyCustom));
+    }
   }
 
   if (!failed.isEmpty())

diff --git a/Source/Core/DolphinQt/MenuBar.cpp b/Source/Core/DolphinQt/MenuBar.cpp
@@ -1066,19 +1066,39 @@ void MenuBar::ImportWiiSave()
   if (file.isEmpty())
     return;
 
-  bool cancelled = false;
   auto can_overwrite = [&] {
-    bool yes = ModalMessageBox::question(
-                   this, tr("Save Import"),
-                   tr("Save data for this title already exists in the NAND. Consider backing up "
-                      "the current data before overwriting.\nOverwrite now?")) == QMessageBox::Yes;
-    cancelled = !yes;
-    return yes;
+    return ModalMessageBox::question(
+               this, tr("Save Import"),
+               tr("Save data for this title already exists in the NAND. Consider backing up "
+                  "the current data before overwriting.\nOverwrite now?")) == QMessageBox::Yes;
   };
-  if (WiiSave::Import(file.toStdString(), can_overwrite))
-    ModalMessageBox::information(this, tr("Save Import"), tr("Successfully imported save files."));
-  else if (!cancelled)
-    ModalMessageBox::critical(this, tr("Save Import"), tr("Failed to import save files."));
+
+  const auto result = WiiSave::Import(file.toStdString(), can_overwrite);
+  switch (result)
+  {
+  case WiiSave::CopyResult::Success:
+    ModalMessageBox::information(this, tr("Save Import"), tr("Successfully imported save file."));
+    break;
+  case WiiSave::CopyResult::CorruptedSource:
+    ModalMessageBox::critical(this, tr("Save Import"),
+                              tr("Failed to import save file. The given file appears to be "
+                                 "corrupted or is not a valid Wii save."));
+    break;
+  case WiiSave::CopyResult::TitleMissing:
+    ModalMessageBox::critical(
+        this, tr("Save Import"),
+        tr("Failed to import save file. Please launch the game once, then try again."));
+    break;
+  case WiiSave::CopyResult::Cancelled:
+    break;
+  default:
+    ModalMessageBox::critical(
+        this, tr("Save Import"),
+        tr("Failed to import save file. Your NAND may be corrupt, or something is preventing "
+           "access to files within it. Try repairing your NAND (Tools -> Manage NAND -> Check "
+           "NAND...), then import the save again."));
+    break;
+  }
 }
 
 void MenuBar::ExportWiiSaves()