Hello everybody - first post here!

I will be flying from the US to Germany and plan on bringing an external harddrive in my carry-on, but will not have a laptop with me. Could this be a problem with security, as I will not be able to demonstrate and "turn on" this electronic device? Has anyone had any similar problems in the past? I am not sure if I'll be purchasing one of the USB powered models or a 5.25" disk and an external enclosure.

I searched through previous threads but it seems this has never come up before. I hope this is a good sign.

Thanks,
Florian