About sap bw system Copy or backup ?(URGENT)

Hi gurus:

Hi friends,I saw many theads about this subject,and I found many documents,But STILL I can't find the way to solve my problem.

It is: How to export the objects I created in develop system to a harddisk, then import it to the QA system . Dev to QA with harddisk NOT online?

And can I backup the whole bw system in the harddisk,and restore the bw system in the qa system istead ? how to backup the bw system ?

All useful reply will assign points

thx

chan