Within folders are subfolders. At the folder prompt, press Space with T (Control with T) to get in to the "directory tree" view, and navigate through each subfolder, and erase that way. Some files may be protected. Use the File Manager Protection Option to unprotect them; also, if you use an asterisk for the multiple character wild card to unprotect all files in a folder, this will not select "hidden" files, so you still cannot erase a directory after unprotecting all files with the wild card, you have to go through the option again and manually select the "hidden" files view (pressing Space at the File to protect?" prompt, and, at the "list of files" view, (pressing space with X) (read with X) to get to it) and the "hidden" file, and once the "hidden" files are unprotected, you should be able to erase the whole directory.
