Getting multiple devices found and don't know which one is the external harddrive I plugged in.

[wajeehulhassanvii]

sudo wdpassport-utils.py --unlock [!] Multiple Western Digital Passport devices found. Use --device /dev/___ to choose.

[wajeehulhassanvii]

found the solution, after looking up for devices in /dev/, in my case it was sdb