A: I had this exact problem as I tried to extract an Intel NIC installation package so I could manually force a driver installation. I tried /e, and it gave no indication of where the expansion had written to.
The secret is to also add the /f<path> switch, which tells the process where to write the extraction. For example,
d:\temp\PROWinx64.exe /e /fd:\temp\intelNote that there's no space between the /f and the path.
For storage drivers, the /e switch doesn't work, so you need to use
-a -n -s -p <path>after the storage driver file.
To see more FAQs, please go to John Savill's FAQs page on Windows IT Pro.