diff --git a/app/Models/File.php b/app/Models/File.php
index c73c46c0..86ffc192 100644
--- a/app/Models/File.php
+++ b/app/Models/File.php
@@ -24,12 +24,8 @@ class File extends Model
      */
     public $timestamps = true;
     protected $fillable = [
-        'user_id',
         'filename',
         'original_filename',
-        'file_hash',
-        'hash_algorithm',
-        'mime_type',
         'description',
         'keywords',
         'directory'
@@ -97,25 +93,25 @@ class File extends Model
         $hash = hash_file(self::HASH_ALGORITHM, $path);
 
         // define mandatory fields
-        $params = [
-            'user_id'           => Auth::user()->id,
-            'filename'          => $file->getFilename(),
-            'original_filename' => $originalFilename,
-            'file_hash'         => $hash,
-            'hash_algorithm'    => self::HASH_ALGORITHM,
-            'mime_type'         => $file->getMimeType(),
-        ];
+        $newFile = new File();
+        $newFile->user_id = Auth::user()->id;
+        $newFile->filename = $file->getFilename();
+        $newFile->original_filename = $originalFilename;
+        $newFile->file_hash = $hash;
+        $newFile->hash_algorithm = self::HASH_ALGORITHM;
+        $newFile->mime_type = $file->getMimeType();
+        $newFile->file_size = $file->getSize();
 
         // save optional fields
         $optionalFields = ['description', 'keywords', 'directory'];
         foreach ($optionalFields as $field) {
             if ($request->has($field)) {
-                $params[$field] = $request->$field;
+                $newFile->$field = $request->$field;
             }
         }
 
         // create new database row
-        $newFile = File::create($params);
+        $newFile->save();
 
         return $newFile->id;
     }
diff --git a/database/migrations/2016_02_08_134354_AddFileSizeTofiles.php b/database/migrations/2016_02_08_134354_AddFileSizeTofiles.php
new file mode 100644
index 00000000..2dfaa024
--- /dev/null
+++ b/database/migrations/2016_02_08_134354_AddFileSizeTofiles.php
@@ -0,0 +1,33 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+
+class AddFileSizeTofiles extends Migration
+{
+    /**
+     * Run the migrations.
+     *
+     * @return void
+     */
+    public function up()
+    {
+        Schema::table('files', function (Blueprint $table) {
+            $table->integer('file_size')
+                  ->after('mime_type')
+                  ->comment('Filesize given in bytes');
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     *
+     * @return void
+     */
+    public function down()
+    {
+        Schema::table('files', function (Blueprint $table) {
+            $table->dropColumn('file_size');
+        });
+    }
+}