diff --git a/launcher/minecraft/World.cpp b/launcher/minecraft/World.cpp
index 1a680ac56..1eba148a5 100644
--- a/launcher/minecraft/World.cpp
+++ b/launcher/minecraft/World.cpp
@@ -206,8 +206,8 @@ int64_t calculateWorldSize(const QFileInfo& file)
         QDirIterator it(file.absoluteFilePath(), QDir::Files, QDirIterator::Subdirectories);
         int64_t total = 0;
         while (it.hasNext()) {
-            total += it.fileInfo().size();
             it.next();
+            total += it.fileInfo().size();
         }
         return total;
     }
diff --git a/launcher/minecraft/mod/ModFolderModel.cpp b/launcher/minecraft/mod/ModFolderModel.cpp
index 5ba1795fb..8f79a4e00 100644
--- a/launcher/minecraft/mod/ModFolderModel.cpp
+++ b/launcher/minecraft/mod/ModFolderModel.cpp
@@ -111,7 +111,7 @@ QVariant ModFolderModel::data(const QModelIndex& index, int role) const
                     return provider.value();
                 }
                 case SizeColumn:
-                    return StringUtils::humanReadableFileSize(m_resources[row]->fileinfo().size(), true);
+                    return StringUtils::humanReadableFileSize(m_resources[row]->size(), true);
                 default:
                     return QVariant();
             }
diff --git a/launcher/minecraft/mod/Resource.cpp b/launcher/minecraft/mod/Resource.cpp
index 79e52a881..0115cf7ca 100644
--- a/launcher/minecraft/mod/Resource.cpp
+++ b/launcher/minecraft/mod/Resource.cpp
@@ -1,5 +1,6 @@
 #include "Resource.h"
 
+#include <QDirIterator>
 #include <QFileInfo>
 #include <QRegularExpression>
 
@@ -18,6 +19,20 @@ void Resource::setFile(QFileInfo file_info)
     parseFile();
 }
 
+qint64 calculateFileSize(const QFileInfo& file)
+{
+    if (file.isDir()) {
+        QDirIterator it(file.absoluteFilePath(), QDir::Files);
+        qint64 total = 0;
+        while (it.hasNext()) {
+            it.next();
+            total += it.fileInfo().size();
+        }
+        return total;
+    }
+    return file.size();
+}
+
 void Resource::parseFile()
 {
     QString file_name{ m_file_info.fileName() };
@@ -26,6 +41,7 @@ void Resource::parseFile()
 
     m_internal_id = file_name;
 
+    m_size = calculateFileSize(m_file_info);
     if (m_file_info.isDir()) {
         m_type = ResourceType::FOLDER;
         m_name = file_name;
@@ -90,9 +106,9 @@ std::pair<int, bool> Resource::compare(const Resource& other, SortType type) con
                 return { -1, type == SortType::DATE };
             break;
         case SortType::SIZE: {
-            if (fileinfo().size() > other.fileinfo().size())
+            if (size() > other.size())
                 return { 1, type == SortType::SIZE };
-            if (fileinfo().size() < other.fileinfo().size())
+            if (size() < other.size())
                 return { -1, type == SortType::SIZE };
             break;
         }
diff --git a/launcher/minecraft/mod/Resource.h b/launcher/minecraft/mod/Resource.h
index d94e4b368..61949f917 100644
--- a/launcher/minecraft/mod/Resource.h
+++ b/launcher/minecraft/mod/Resource.h
@@ -45,6 +45,7 @@ class Resource : public QObject {
     [[nodiscard]] auto internal_id() const -> QString { return m_internal_id; }
     [[nodiscard]] auto type() const -> ResourceType { return m_type; }
     [[nodiscard]] bool enabled() const { return m_enabled; }
+    [[nodiscard]] qint64 size() const { return m_size; }
 
     [[nodiscard]] virtual auto name() const -> QString { return m_name; }
     [[nodiscard]] virtual bool valid() const { return m_type != ResourceType::UNKNOWN; }
@@ -117,4 +118,5 @@ class Resource : public QObject {
     bool m_is_resolving = false;
     bool m_is_resolved = false;
     int m_resolution_ticket = 0;
+    qint64 m_size = 0;
 };
diff --git a/launcher/minecraft/mod/ResourceFolderModel.cpp b/launcher/minecraft/mod/ResourceFolderModel.cpp
index 16ff01227..648bf84db 100644
--- a/launcher/minecraft/mod/ResourceFolderModel.cpp
+++ b/launcher/minecraft/mod/ResourceFolderModel.cpp
@@ -416,7 +416,7 @@ QVariant ResourceFolderModel::data(const QModelIndex& index, int role) const
                 case DateColumn:
                     return m_resources[row]->dateTimeChanged();
                 case SizeColumn:
-                    return StringUtils::humanReadableFileSize(m_resources[row]->fileinfo().size(), true);
+                    return StringUtils::humanReadableFileSize(m_resources[row]->size(), true);
                 default:
                     return {};
             }
diff --git a/launcher/minecraft/mod/ResourcePackFolderModel.cpp b/launcher/minecraft/mod/ResourcePackFolderModel.cpp
index e9c3d3043..cf2eb50df 100644
--- a/launcher/minecraft/mod/ResourcePackFolderModel.cpp
+++ b/launcher/minecraft/mod/ResourcePackFolderModel.cpp
@@ -88,7 +88,7 @@ QVariant ResourcePackFolderModel::data(const QModelIndex& index, int role) const
                 case DateColumn:
                     return m_resources[row]->dateTimeChanged();
                 case SizeColumn:
-                    return StringUtils::humanReadableFileSize(m_resources[row]->fileinfo().size(), true);
+                    return StringUtils::humanReadableFileSize(m_resources[row]->size(), true);
 
                 default:
                     return {};
diff --git a/launcher/minecraft/mod/TexturePackFolderModel.cpp b/launcher/minecraft/mod/TexturePackFolderModel.cpp
index e3f369bb8..63fb1f8b3 100644
--- a/launcher/minecraft/mod/TexturePackFolderModel.cpp
+++ b/launcher/minecraft/mod/TexturePackFolderModel.cpp
@@ -79,7 +79,7 @@ QVariant TexturePackFolderModel::data(const QModelIndex& index, int role) const
                 case DateColumn:
                     return m_resources[row]->dateTimeChanged();
                 case SizeColumn:
-                    return StringUtils::humanReadableFileSize(m_resources[row]->fileinfo().size(), true);
+                    return StringUtils::humanReadableFileSize(m_resources[row]->size(), true);
                 default:
                     return {};
             }