diff --git a/src/plugins/coreplugin/dialogs/newdialog.cpp b/src/plugins/coreplugin/dialogs/newdialog.cpp
index b09ddf67de5..a8b5ae55a64 100644
--- a/src/plugins/coreplugin/dialogs/newdialog.cpp
+++ b/src/plugins/coreplugin/dialogs/newdialog.cpp
@@ -242,7 +242,7 @@ static bool wizardFactoryLessThan(const IWizardFactory *f1, const IWizardFactory
 }
 
 void NewDialog::setWizardFactories(QList<IWizardFactory *> factories,
-                                   const QString &defaultLocation,
+                                   const FilePath &defaultLocation,
                                    const QVariantMap &extraVariables)
 {
     m_defaultLocation = defaultLocation;
@@ -501,7 +501,7 @@ void NewDialog::accept()
     if (m_ui->templatesView->currentIndex().isValid()) {
         IWizardFactory *wizard = currentWizardFactory();
         if (QTC_GUARD(wizard)) {
-            QMetaObject::invokeMethod(wizard, std::bind(&runWizard, wizard, m_defaultLocation,
+            QMetaObject::invokeMethod(wizard, std::bind(&runWizard, wizard, m_defaultLocation.toString(),
                                       selectedPlatform(), m_extraVariables), Qt::QueuedConnection);
         }
     }
diff --git a/src/plugins/coreplugin/dialogs/newdialog.h b/src/plugins/coreplugin/dialogs/newdialog.h
index 5bbad3dd408..07af7648423 100644
--- a/src/plugins/coreplugin/dialogs/newdialog.h
+++ b/src/plugins/coreplugin/dialogs/newdialog.h
@@ -27,6 +27,8 @@
 
 #include "../iwizardfactory.h"
 
+#include <utils/filepath.h>
+
 #include <QDialog>
 #include <QIcon>
 #include <QList>
@@ -54,7 +56,9 @@ public:
     explicit NewDialog(QWidget *parent);
     ~NewDialog() override;
 
-    void setWizardFactories(QList<IWizardFactory*> factories, const QString &defaultLocation, const QVariantMap &extraVariables);
+    void setWizardFactories(QList<IWizardFactory*> factories,
+                            const Utils::FilePath &defaultLocation,
+                            const QVariantMap &extraVariables);
 
     void showDialog();
     Utils::Id selectedPlatform() const;
@@ -84,7 +88,7 @@ private:
     QPushButton *m_okButton = nullptr;
     QIcon m_dummyIcon;
     QList<QStandardItem*> m_categoryItems;
-    QString m_defaultLocation;
+    Utils::FilePath m_defaultLocation;
     QVariantMap m_extraVariables;
 };
 
diff --git a/src/plugins/coreplugin/icore.cpp b/src/plugins/coreplugin/icore.cpp
index 25d89899eaa..103249e5d13 100644
--- a/src/plugins/coreplugin/icore.cpp
+++ b/src/plugins/coreplugin/icore.cpp
@@ -245,7 +245,7 @@ ICore::~ICore()
 */
 void ICore::showNewItemDialog(const QString &title,
                               const QList<IWizardFactory *> &factories,
-                              const QString &defaultLocation,
+                              const FilePath &defaultLocation,
                               const QVariantMap &extraVariables)
 {
     QTC_ASSERT(!isNewItemDialogRunning(), return);
diff --git a/src/plugins/coreplugin/icore.h b/src/plugins/coreplugin/icore.h
index 5aa7314d95c..02e833a934a 100644
--- a/src/plugins/coreplugin/icore.h
+++ b/src/plugins/coreplugin/icore.h
@@ -78,8 +78,8 @@ public:
     static QWidget *newItemDialog();
     static void showNewItemDialog(const QString &title,
                                   const QList<IWizardFactory *> &factories,
-                                  const QString &defaultLocation = QString(),
-                                  const QVariantMap &extraVariables = QVariantMap());
+                                  const Utils::FilePath &defaultLocation = {},
+                                  const QVariantMap &extraVariables = {});
 
     static bool showOptionsDialog(const Utils::Id page, QWidget *parent = nullptr);
     static QString msgShowOptionsDialog();
diff --git a/src/plugins/coreplugin/iwizardfactory.cpp b/src/plugins/coreplugin/iwizardfactory.cpp
index 94b21a3c091..2a5700d0fda 100644
--- a/src/plugins/coreplugin/iwizardfactory.cpp
+++ b/src/plugins/coreplugin/iwizardfactory.cpp
@@ -141,7 +141,7 @@ class NewItemDialogData
 {
 public:
     void setData(const QString &t, const QList<IWizardFactory *> &f,
-                 const QString &dl, const QVariantMap &ev)
+                 const FilePath &dl, const QVariantMap &ev)
     {
         QTC_ASSERT(!hasData(), return);
 
@@ -173,7 +173,7 @@ public:
 private:
     QString title;
     QList<IWizardFactory *> factories;
-    QString defaultLocation;
+    FilePath defaultLocation;
     QVariantMap extraVariables;
 };
 
@@ -358,7 +358,7 @@ QWidget *IWizardFactory::currentWizard()
 
 void IWizardFactory::requestNewItemDialog(const QString &title,
                                           const QList<IWizardFactory *> &factories,
-                                          const QString &defaultLocation,
+                                          const FilePath &defaultLocation,
                                           const QVariantMap &extraVariables)
 {
     s_reopenData.setData(title, factories, defaultLocation, extraVariables);
diff --git a/src/plugins/coreplugin/iwizardfactory.h b/src/plugins/coreplugin/iwizardfactory.h
index b49bcab7223..cc027eb7de4 100644
--- a/src/plugins/coreplugin/iwizardfactory.h
+++ b/src/plugins/coreplugin/iwizardfactory.h
@@ -36,7 +36,10 @@
 
 QT_FORWARD_DECLARE_CLASS(QAction)
 
-namespace Utils { class Wizard; }
+namespace Utils {
+class FilePath;
+class Wizard;
+} // Utils
 
 namespace Core {
 
@@ -107,7 +110,7 @@ public:
 
     static void requestNewItemDialog(const QString &title,
                                      const QList<IWizardFactory *> &factories,
-                                     const QString &defaultLocation,
+                                     const Utils::FilePath &defaultLocation,
                                      const QVariantMap &extraVariables);
 
 protected:
diff --git a/src/plugins/coreplugin/mainwindow.cpp b/src/plugins/coreplugin/mainwindow.cpp
index 9bf003a7de2..2f8fb3cecd9 100644
--- a/src/plugins/coreplugin/mainwindow.cpp
+++ b/src/plugins/coreplugin/mainwindow.cpp
@@ -525,7 +525,7 @@ void MainWindow::registerDefaultActions()
     connect(m_newAction, &QAction::triggered, this, []() {
         if (!ICore::isNewItemDialogRunning()) {
             ICore::showNewItemDialog(tr("New File or Project", "Title of dialog"),
-                                     IWizardFactory::allWizardFactories(), QString());
+                                     IWizardFactory::allWizardFactories(), FilePath());
         } else {
             ICore::raiseWindow(ICore::newItemDialog());
         }
diff --git a/src/plugins/mesonprojectmanager/project/projecttree/projecttree.cpp b/src/plugins/mesonprojectmanager/project/projecttree/projecttree.cpp
index cd1eaa76b1e..eca7b685231 100644
--- a/src/plugins/mesonprojectmanager/project/projecttree/projecttree.cpp
+++ b/src/plugins/mesonprojectmanager/project/projecttree/projecttree.cpp
@@ -58,7 +58,7 @@ void addTargetNode(std::unique_ptr<MesonProjectNode> &root, const Target &target
             if (asFolder) {
                 auto targetNode = std::make_unique<MesonTargetNode>(
                     path.absolutePath().pathAppended(target.name),
-                    Target::fullName(Utils::FilePath::fromString(root->path()), target));
+                    Target::fullName(root->path(), target));
                 targetNode->setDisplayName(target.name);
                 asFolder->addNode(std::move(targetNode));
             }
diff --git a/src/plugins/nim/project/nimbuildsystem.cpp b/src/plugins/nim/project/nimbuildsystem.cpp
index 2a3612ad763..afb23f00561 100644
--- a/src/plugins/nim/project/nimbuildsystem.cpp
+++ b/src/plugins/nim/project/nimbuildsystem.cpp
@@ -77,7 +77,8 @@ NimProjectScanner::NimProjectScanner(Project *project)
         }
 
         // Sync watched dirs
-        const QSet<QString> fsDirs = Utils::transform<QSet>(nodes, &FileNode::directory);
+        const QSet<QString> fsDirs = Utils::transform<QSet>(nodes,
+            [](const std::unique_ptr<FileNode> &fn) { return fn->directory().toString(); });
         const QSet<QString> projectDirs = Utils::toSet(m_directoryWatcher.directories());
         m_directoryWatcher.addDirectories(Utils::toList(fsDirs - projectDirs), FileSystemWatcher::WatchAllChanges);
         m_directoryWatcher.removeDirectories(Utils::toList(projectDirs - fsDirs));
diff --git a/src/plugins/projectexplorer/foldernavigationwidget.cpp b/src/plugins/projectexplorer/foldernavigationwidget.cpp
index 9670292be0f..d990d0196fd 100644
--- a/src/plugins/projectexplorer/foldernavigationwidget.cpp
+++ b/src/plugins/projectexplorer/foldernavigationwidget.cpp
@@ -512,7 +512,7 @@ void FolderNavigationWidget::addNewItem()
                                    Utils::filtered(Core::IWizardFactory::allWizardFactories(),
                                                    Utils::equal(&Core::IWizardFactory::kind,
                                                                 Core::IWizardFactory::FileWizard)),
-                                   path.toString());
+                                   path);
 }
 
 void FolderNavigationWidget::editCurrentItem()
diff --git a/src/plugins/projectexplorer/projectexplorer.cpp b/src/plugins/projectexplorer/projectexplorer.cpp
index d916ec4efc2..d7eb090c323 100644
--- a/src/plugins/projectexplorer/projectexplorer.cpp
+++ b/src/plugins/projectexplorer/projectexplorer.cpp
@@ -3515,7 +3515,7 @@ void ProjectExplorerPluginPrivate::addNewFile()
 {
     Node *currentNode = ProjectTree::currentNode();
     QTC_ASSERT(currentNode, return);
-    QString location = currentNode->directory();
+    FilePath location = currentNode->directory();
 
     QVariantMap map;
     // store void pointer to avoid QVariant to use qobject_cast, which might core-dump when trying
@@ -3541,7 +3541,7 @@ void ProjectExplorerPluginPrivate::addNewSubproject()
 {
     Node* currentNode = ProjectTree::currentNode();
     QTC_ASSERT(currentNode, return);
-    QString location = currentNode->directory();
+    FilePath location = currentNode->directory();
 
     if (currentNode->isProjectNodeType()
             && currentNode->supportsAction(AddSubProject, currentNode)) {
@@ -3576,9 +3576,9 @@ void ProjectExplorerPluginPrivate::addExistingProjects()
     if (!projectNode && currentNode->asContainerNode())
         projectNode = currentNode->asContainerNode()->rootProjectNode();
     QTC_ASSERT(projectNode, return);
-    const QString dir = currentNode->directory();
+    const FilePath dir = currentNode->directory();
     QStringList subProjectFilePaths = QFileDialog::getOpenFileNames(
-                ICore::dialogParent(), tr("Choose Project File"), dir,
+                ICore::dialogParent(), tr("Choose Project File"), dir.toString(),
                 projectNode->subProjectFileNamePatterns().join(";;"));
     if (!ProjectTree::hasNode(projectNode))
         return;
@@ -3605,7 +3605,7 @@ void ProjectExplorerPluginPrivate::addExistingProjects()
                              message + "\n  " + failedProjects.join("\n  "));
         return;
     }
-    VcsManager::promptToAdd(dir, addedProjects);
+    VcsManager::promptToAdd(dir.toString(), addedProjects);
 }
 
 void ProjectExplorerPluginPrivate::handleAddExistingFiles()
@@ -3616,7 +3616,7 @@ void ProjectExplorerPluginPrivate::handleAddExistingFiles()
     QTC_ASSERT(folderNode, return);
 
     QStringList fileNames = QFileDialog::getOpenFileNames(ICore::dialogParent(),
-        tr("Add Existing Files"), node->directory());
+        tr("Add Existing Files"), node->directory().toString());
     if (fileNames.isEmpty())
         return;
 
@@ -3631,8 +3631,7 @@ void ProjectExplorerPluginPrivate::addExistingDirectory()
 
     QTC_ASSERT(folderNode, return);
 
-    SelectableFilesDialogAddDirectory dialog(FilePath::fromString(node->directory()),
-                                             FilePaths(), ICore::dialogParent());
+    SelectableFilesDialogAddDirectory dialog(node->directory(), FilePaths(), ICore::dialogParent());
     dialog.setAddFileFilter({});
 
     if (dialog.exec() == QDialog::Accepted)
@@ -3645,7 +3644,7 @@ void ProjectExplorerPlugin::addExistingFiles(FolderNode *folderNode, const FileP
     if (!folderNode || !ProjectTree::hasNode(folderNode))
         return;
 
-    const QString dir = folderNode->directory();
+    const FilePath dir = folderNode->directory();
     FilePaths fileNames = filePaths;
     FilePaths notAdded;
     folderNode->addFiles(fileNames, &notAdded);
@@ -3659,7 +3658,7 @@ void ProjectExplorerPlugin::addExistingFiles(FolderNode *folderNode, const FileP
                                     [&notAdded](const FilePath &f) { return !notAdded.contains(f); });
     }
 
-    VcsManager::promptToAdd(dir, Utils::transform(fileNames, &FilePath::toString));
+    VcsManager::promptToAdd(dir.toString(), Utils::transform(fileNames, &FilePath::toString));
 }
 
 void ProjectExplorerPluginPrivate::removeProject()
@@ -3687,14 +3686,14 @@ void ProjectExplorerPluginPrivate::searchOnFileSystem()
 {
     const Node *currentNode = ProjectTree::currentNode();
     QTC_ASSERT(currentNode, return);
-    TextEditor::FindInFiles::findOnFileSystem(currentNode->path());
+    TextEditor::FindInFiles::findOnFileSystem(currentNode->path().toString());
 }
 
 void ProjectExplorerPluginPrivate::showInGraphicalShell()
 {
     Node *currentNode = ProjectTree::currentNode();
     QTC_ASSERT(currentNode, return);
-    Core::FileUtils::showInGraphicalShell(ICore::dialogParent(), currentNode->path());
+    Core::FileUtils::showInGraphicalShell(ICore::dialogParent(), currentNode->path().toString());
 }
 
 void ProjectExplorerPluginPrivate::openTerminalHere(const EnvironmentGetter &env)
@@ -3706,7 +3705,7 @@ void ProjectExplorerPluginPrivate::openTerminalHere(const EnvironmentGetter &env
     if (!environment)
         return;
 
-    Core::FileUtils::openTerminal(currentNode->directory(), environment.value());
+    Core::FileUtils::openTerminal(currentNode->directory().toString(), environment.value());
 }
 
 void ProjectExplorerPluginPrivate::openTerminalHereWithRunEnv()
@@ -3728,7 +3727,7 @@ void ProjectExplorerPluginPrivate::openTerminalHereWithRunEnv()
         device = DeviceKitAspect::device(target->kit());
     QTC_ASSERT(device && device->canOpenTerminal(), return);
     const QString workingDir = device->type() == Constants::DESKTOP_DEVICE_TYPE
-            ? currentNode->directory() : runnable.workingDirectory;
+            ? currentNode->directory().toString() : runnable.workingDirectory;
     device->openTerminal(runnable.environment, workingDir);
 }
 
diff --git a/src/plugins/projectexplorer/projectnodes.cpp b/src/plugins/projectexplorer/projectnodes.cpp
index 2e09d587fd0..4f7b04dc51a 100644
--- a/src/plugins/projectexplorer/projectnodes.cpp
+++ b/src/plugins/projectexplorer/projectnodes.cpp
@@ -311,28 +311,30 @@ FileType Node::fileTypeForFileName(const Utils::FilePath &file)
     return fileTypeForMimeType(Utils::mimeTypeForFile(file, Utils::MimeMatchMode::MatchExtension));
 }
 
-QString Node::pathOrDirectory(bool dir) const
+FilePath Node::pathOrDirectory(bool dir) const
 {
-    QString location;
+    FilePath location;
     const FolderNode *folder = asFolderNode();
     if (isVirtualFolderType() && folder) {
         // Virtual Folder case
         // If there are files directly below or no subfolders, take the folder path
         if (!folder->fileNodes().isEmpty() || folder->folderNodes().isEmpty()) {
-            location = m_filePath.toString();
+            location = m_filePath;
         } else {
             // Otherwise we figure out a commonPath from the subfolders
             QStringList list;
             foreach (FolderNode *f, folder->folderNodes())
                 list << f->filePath().toString() + QLatin1Char('/');
-            location = Utils::commonPath(list);
+            location = FilePath::fromString(Utils::commonPath(list));
         }
 
-        QFileInfo fi(location);
+        QTC_CHECK(!location.needsDevice());
+        QFileInfo fi = location.toFileInfo();
         while ((!fi.exists() || !fi.isDir()) && !fi.isRoot())
             fi.setFile(fi.absolutePath());
-        location = fi.absoluteFilePath();
+        location = FilePath::fromString(fi.absoluteFilePath());
     } else if (!m_filePath.isEmpty()) {
+        QTC_CHECK(!m_filePath.needsDevice());
         QFileInfo fi = m_filePath.toFileInfo();
         // remove any /suffixes, which e.g. ResourceNode uses
         // Note this could be removed again by making path() a true path again
@@ -341,9 +343,9 @@ QString Node::pathOrDirectory(bool dir) const
             fi.setFile(fi.absolutePath());
 
         if (dir)
-            location = fi.isDir() ? fi.absoluteFilePath() : fi.absolutePath();
+            location = FilePath::fromString(fi.isDir() ? fi.absoluteFilePath() : fi.absolutePath());
         else
-            location = fi.absoluteFilePath();
+            location = FilePath::fromString(fi.absoluteFilePath());
     }
     return location;
 }
diff --git a/src/plugins/projectexplorer/projectnodes.h b/src/plugins/projectexplorer/projectnodes.h
index 85fed71431d..ad8b9f3eeb9 100644
--- a/src/plugins/projectexplorer/projectnodes.h
+++ b/src/plugins/projectexplorer/projectnodes.h
@@ -176,8 +176,8 @@ public:
     static FileType fileTypeForMimeType(const Utils::MimeType &mt);
     static FileType fileTypeForFileName(const Utils::FilePath &file);
 
-    QString path() const { return pathOrDirectory(false); }
-    QString directory() const { return pathOrDirectory(true); }
+    Utils::FilePath path() const { return pathOrDirectory(false); }
+    Utils::FilePath directory() const { return pathOrDirectory(true); }
 
 protected:
     Node();
@@ -187,7 +187,7 @@ protected:
     void setFilePath(const Utils::FilePath &filePath);
 
 private:
-    QString pathOrDirectory(bool dir) const;
+    Utils::FilePath pathOrDirectory(bool dir) const;
 
     FolderNode *m_parentFolderNode = nullptr;
     Utils::FilePath m_filePath;
diff --git a/src/plugins/projectexplorer/projectwizardpage.cpp b/src/plugins/projectexplorer/projectwizardpage.cpp
index 84a3664895c..aaa63116b59 100644
--- a/src/plugins/projectexplorer/projectwizardpage.cpp
+++ b/src/plugins/projectexplorer/projectwizardpage.cpp
@@ -95,7 +95,7 @@ AddNewTree::AddNewTree(FolderNode *node, QList<AddNewTree *> children, const QSt
     m_canAdd(false)
 {
     if (node)
-        m_toolTip = node->directory();
+        m_toolTip = node->directory().toString();
     foreach (AddNewTree *child, children)
         appendChild(child);
 }
@@ -107,7 +107,7 @@ AddNewTree::AddNewTree(FolderNode *node, QList<AddNewTree *> children,
     m_priority(info.priority)
 {
     if (node)
-        m_toolTip = node->directory();
+        m_toolTip = node->directory().toString();
     foreach (AddNewTree *child, children)
         appendChild(child);
 }
@@ -180,7 +180,7 @@ void BestNodeSelector::inspect(AddNewTree *tree, bool isContextNode)
     if (m_deploys)
         return;
 
-    const QString projectDirectory = node->directory();
+    const QString projectDirectory = node->directory().toString();
     const int projectDirectorySize = projectDirectory.size();
     if (m_commonDirectory != projectDirectory
             && !m_commonDirectory.startsWith(projectDirectory + QLatin1Char('/'))
diff --git a/src/plugins/qmakeprojectmanager/wizards/subdirsprojectwizard.cpp b/src/plugins/qmakeprojectmanager/wizards/subdirsprojectwizard.cpp
index dc7fc17908d..7c51c471e5d 100644
--- a/src/plugins/qmakeprojectmanager/wizards/subdirsprojectwizard.cpp
+++ b/src/plugins/qmakeprojectmanager/wizards/subdirsprojectwizard.cpp
@@ -96,7 +96,8 @@ bool SubdirsProjectWizard::postGenerateFiles(const QWizard *w, const Core::Gener
                                                              [](Core::IWizardFactory *f) {
                                                                  return f->supportedProjectTypes().contains(Constants::QMAKEPROJECT_ID);
                                                              }),
-                                             wizard->parameters().projectPath(), map);
+                                             Utils::FilePath::fromString(wizard->parameters().projectPath()),
+                                             map);
     } else {
         return false;
     }