Opera 12 and earlier the filename was "bookmarks.adr" Latest versions filename is "bookmarks" without an extension. You still haven't mentioned which version of opera you have. Opera 26 can import bookmarks from opera 12. Don't think it would work just copying the file into your profile location of opera and renaming it bookmarks. You said, *Recently i have deleted opera and all of it files." Did you make a copy of the bookmark file?