<i>The folder tree, aka file categories, is essential is file management.</i><b>文件夾樹，又名文件類別，對文件管理至關重要。</b> <i>You can expand and collapse category levels to display hierarchical folders with their own files.</i><b>您可以展開和折疊類別級別，以顯示具有其自身文件的分層文件夾。</b> <i>Sub-folder levels are unlimited.</i><b>子文件夾級別不受限制。</b> <i>Moreover, there is no faster way to edit category position and level that using drag'n drop.</i><b>此外，沒有比使用拖放功能更快的方法來編輯類別位置和級別。</b>
