diff --git a/src/LfmItem.php b/src/LfmItem.php
index 74d133af..65cc9049 100644
--- a/src/LfmItem.php
+++ b/src/LfmItem.php
@@ -9,14 +9,17 @@ class LfmItem
 {
     private $lfm;
     private $helper;
+    private $isDirectory;
+    private $mimeType = null;
 
     private $columns = ['name', 'url', 'time', 'icon', 'is_file', 'is_image', 'thumb_url'];
     public $attributes = [];
 
-    public function __construct(LfmPath $lfm, Lfm $helper)
+    public function __construct(LfmPath $lfm, Lfm $helper, $isDirectory = false)
     {
         $this->lfm = $lfm->thumb(false);
         $this->helper = $helper;
+        $this->isDirectory = $isDirectory;
     }
 
     public function __get($var_name)
@@ -50,7 +53,7 @@ public function path($type = 'absolute')
 
     public function isDirectory()
     {
-        return $this->lfm->isDirectory();
+        return $this->isDirectory;
     }
 
     public function isFile()
@@ -66,11 +69,7 @@ public function isFile()
      */
     public function isImage()
     {
-        if (!$this->isDirectory()) {
-            return Str::startsWith($this->mimeType(), 'image');
-        }
-
-        return false;
+        return $this->isFile() && Str::startsWith($this->mimeType(), 'image');
     }
 
     /**
@@ -79,14 +78,13 @@ public function isImage()
      * @param  mixed  $file  Real path of a file or instance of UploadedFile.
      * @return string
      */
-    // TODO: uploaded file
     public function mimeType()
     {
-        // if ($file instanceof UploadedFile) {
-        //     return $file->getMimeType();
-        // }
+        if (is_null($this->mimeType)) {
+            $this->mimeType = $this->lfm->mimeType();
+        }
 
-        return $this->lfm->mimeType();
+        return $this->mimeType;
     }
 
     public function extension()
diff --git a/src/LfmPath.php b/src/LfmPath.php
index a4ff93af..7db5e767 100644
--- a/src/LfmPath.php
+++ b/src/LfmPath.php
@@ -70,7 +70,7 @@ public function path($type = 'storage')
         } elseif ($type == 'storage') {
             // storage: files/{user_slug}
             // storage on windows: files\{user_slug}
-            return $this->translateToOsPath($this->path('url'));
+            return str_replace(Lfm::DS, $this->helper->ds(), $this->path('url'));
         } else {
             // absolute: /var/www/html/project/storage/app/files/{user_slug}
             // absolute on windows: C:\project\storage\app\files\{user_slug}
@@ -83,11 +83,6 @@ public function translateToLfmPath($path)
         return str_replace($this->helper->ds(), Lfm::DS, $path);
     }
 
-    public function translateToOsPath($path)
-    {
-        return str_replace(Lfm::DS, $this->helper->ds(), $path);
-    }
-
     public function url()
     {
         return $this->storage->url($this->path('url'));
@@ -96,7 +91,7 @@ public function url()
     public function folders()
     {
         $all_folders = array_map(function ($directory_path) {
-            return $this->pretty($directory_path);
+            return $this->pretty($directory_path, true);
         }, $this->storage->directories());
 
         $folders = array_filter($all_folders, function ($directory) {
@@ -115,11 +110,12 @@ public function files()
         return $this->sortByColumn($files);
     }
 
-    public function pretty($item_path)
+    public function pretty($item_path, $isDirectory = false)
     {
         return Container::getInstance()->makeWith(LfmItem::class, [
             'lfm' => (clone $this)->setName($this->helper->getNameFromPath($item_path)),
-            'helper' => $this->helper
+            'helper' => $this->helper,
+            'isDirectory' => $isDirectory
         ]);
     }