1.Make a file.
①You can write a file in the application by copying from Internet or from you email.
②Also you can transfer files via WiFi.
★ .Windows PC: You can upload "*.txt" files with "ASCII" or "UTF-8" format only.
★ .Mac OS: You can upload "*.rtf" files and then change it in the application later.
2.File types supported
Although only text file is supported, but you can still upload "*.doc", "*.xls", "*.plist", "*.rtf"…… files and then copy these files' contents and make new text files later in the application.