Delete All Files in Main Folder and Sub Folder While Maintaining Folder Tree Structure in Windows XP Most of the times we have to delete all the files in main folder and sub folders but by maintaining the tree structure of folders. However, this function is not provided by Windows OS by default. You’ll be able to conduct this activity manually by selecting the folders and … [Read more...] about Delete All Files in Main Folder and Sub Folder While Maintaining Folder Tree Structure in Windows XP