FolderMemoryCard: Only add folders if all files and subfolders in it also fit into the remaining memory card space.

This avoids situations where, for example, it would only add the icon file but not the game data file because the memory card was near-full.

pcsx2/gui/MemoryCardFolder.cpp

@@ -316,7 +316,7 @@ bool FolderMemoryCard::AddFolder( MemoryCardFileEntry* const dirEntry, const wxS
 				}
 
 				// make sure we have enough space on the memcard for the directory
-				const u32 newNeededClusters = ( dirEntry->entry.data.length % 2 ) == 0 ? 2 : 1;
+				const u32 newNeededClusters = CalculateRequiredClustersOfDirectory( dirPath + L"/" + fileName ) + ( ( dirEntry->entry.data.length % 2 ) == 0 ? 1 : 0 );
 				if ( newNeededClusters > GetAmountFreeDataClusters() ) {
 					Console.Warning( GetCardFullMessage( fileName ) );
 					hasNext = dir.GetNext( &fileName );
@@ -454,6 +454,39 @@ bool FolderMemoryCard::AddFile( MemoryCardFileEntry* const dirEntry, const wxStr
 	return true;
 }
 
+u32 FolderMemoryCard::CalculateRequiredClustersOfDirectory( const wxString& dirPath ) {
+	const u32 clusterSize = m_superBlock.data.pages_per_cluster * m_superBlock.data.page_len;
+	u32 requiredFileEntryPages = 2;
+	u32 requiredClusters = 0;
+
+	wxDir dir( dirPath );
+	wxString fileName;
+	bool hasNext = dir.GetFirst( &fileName );
+	while ( hasNext ) {
+		if ( fileName.StartsWith( L"_pcsx2_" ) ) {
+			hasNext = dir.GetNext( &fileName );
+			continue;
+		}
+
+		++requiredFileEntryPages;
+		wxFileName file( dirPath, fileName );
+		wxString path = file.GetFullPath();
+		bool isFile = wxFile::Exists( path );
+
+		if ( isFile ) {
+			const u32 filesize = file.GetSize().GetValue();
+			const u32 countClusters = ( filesize % clusterSize ) != 0 ? ( filesize / clusterSize + 1 ) : ( filesize / clusterSize );
+			requiredClusters += countClusters;
+		} else {
+			requiredClusters += CalculateRequiredClustersOfDirectory( path );
+		}
+
+		hasNext = dir.GetNext( &fileName );
+	}
+
+	return requiredClusters + requiredFileEntryPages / 2 + ( requiredFileEntryPages % 2 == 0 ? 0 : 1 );
+}
+
 MemoryCardFileMetadataReference* FolderMemoryCard::AddDirEntryToMetadataQuickAccess( MemoryCardFileEntry* const entry, MemoryCardFileMetadataReference* const parent ) {
 	MemoryCardFileMetadataReference* ref = &m_fileMetadataQuickAccess[entry->entry.data.cluster];
 	ref->parent = parent;

pcsx2/gui/MemoryCardFolder.h

@@ -357,6 +357,9 @@ protected:
 	// - parent: pointer to the parent dir's quick-access reference element
 	bool AddFile( MemoryCardFileEntry* const dirEntry, const wxString& dirPath, const wxString& fileName, MemoryCardFileMetadataReference* parent = nullptr );
 
+	// calculates the amount of clusters a directory would use up if put into a memory card
+	u32 CalculateRequiredClustersOfDirectory( const wxString& dirPath );
+
 
 	// adds a file to the quick-access dictionary, so it can be accessed more efficiently (ie, without searching through the entire file system) later
 	void AddFileEntryToMetadataQuickAccess( MemoryCardFileEntry* const entry, MemoryCardFileMetadataReference* const parent );