Netweaver 7.5 upgrade from 7.1

Hello All,

This is my first upgrade of SAP system and please excuse if questions are silly.

Currently I have downloaded following Packages and and have set up the SUM on the host.

After first few steps in SUM its asking about the download directory in SELECT TARGET SYSTEM version step.

I dont have Solution manager and intend to Prepare the download directory Manually. I want to know what all do I need to put in download directory to proceed.

Is there any detailed Guide to explain this.

I am currently following NW Update Guide using SUM but that does not list in detail.

Thanks

Rupesh