If you need to move WSUS 3.0 SP2 repository from a drive to another without download again patches you can proceed in this way:
1. Locate Wsus packages drive and folder
2. Locate wsusutil that should be similar to this examplificative path C:\Program Files\Update Services\Tools
3. give this command line:
wsusutil movecontent contentpathdestinationpath logfile
For Example
wsusutil movecontent e:\packages d:\move.log
here is official Microsoft article that is exaustive on WSUS 3.0 SP2
Manage WSUS 3.0 SP2 Storage
https://technet.microsoft.com/en-us/library/dd939905(v=ws.10).aspx