There are a lot of threads on that topic. Problem is none of them give me a working solution.
I've got a WD MyBook World Edition I, 1TB running 02.00.15 firmware with unregistered WDAnywhere Access. I'm not running any Mionet apps or any other WD software. Network is setup as DHCP. Deleted all shared entries with net use * /del — five computers use that drive over the network
Everytime I try to update with hacked firmware I get "drive is currently busy" message