I get the message to disconnect all USB devices and connect only the WD drive, but the WD drive is the only one connected?
Need more info which drive and revision level you have now. If it’s a new drive it may be up to date. look at some of yesterdays posts. The software peopleneglected to insert a message that you were already up to date. Check this http://community.wdc.com/t5/Other-Ideas/More-useful-error-messages-in-Firmware-Updater/idi-p/80189
