diff --git a/model/placesmodel.cpp b/model/placesmodel.cpp
index 9c27838..337da74 100644
--- a/model/placesmodel.cpp
+++ b/model/placesmodel.cpp
@@ -254,6 +254,7 @@ void PlacesModel::onDeviceAdded(const QString &udi)
         beginInsertRows(QModelIndex(), rowCount(), rowCount());
         PlacesItem *deviceItem = new PlacesItem;
         deviceItem->setUdi(udi);
+        deviceItem->setCategory(tr("Drives"));
         m_items.append(deviceItem);
         endInsertRows();
     }
diff --git a/qml/SideBar.qml b/qml/SideBar.qml
index 590ad84..24001be 100644
--- a/qml/SideBar.qml
+++ b/qml/SideBar.qml
@@ -29,6 +29,10 @@ ListView {
 
     signal clicked(string path)
 
+    FishUI.WheelHandler {
+        target: sideBar
+    }
+
     PlacesModel {
         id: placesModel
         onDeviceSetupDone: sideBar.clicked(filePath)    // 设备挂载上后，模拟点击了该设备以打开该页面
diff --git a/thumbnailer/thumbnailprovider.cpp b/thumbnailer/thumbnailprovider.cpp
index f77399d..c76bcce 100644
--- a/thumbnailer/thumbnailprovider.cpp
+++ b/thumbnailer/thumbnailprovider.cpp
@@ -33,6 +33,9 @@ QImage ThumbnailProvider::requestImage(const QString &id, QSize *size, const QSi
     if (size)
         *size = requestedSize;
 
+    QString f = id;
+    qDebug() << id << QFile::exists(f.replace("file://", ""));
+
     QString thumbnail = ThumbnailCache::self()->requestThumbnail(id, requestedSize);
 
     if (!thumbnail.isEmpty()) {