wouldnt you be better off posting that question here
http://www.yunqa.de/delphi/doku.php/mailinglist[
^]
apart from that, a sqlite database is nothing special - its a 'file' with the name you give it - so why dont you simply use the copy command/tools for your O/S - in this case Explorer, or, a CMD prompt and (for example) copy mydatabase.db mybackupdatabase.db