How important is the data on that hdd? The clicking sounds are more than likely internal mechanisms warping over time, it's probably recoverable professionally at extreme cost (a new wiiu will probably be cheaper).
However, and this really really would be a last ditch suicide mission, there is a way of sometimes recovering it just long enough to pull some data.
If you can seal the drive in a sandwich bag or similar and freeze it it can shrink the internal mechanism and potentially allow movement again.
It will kill your drive. It probably wont work. If its not sealed it could short the circuit boards/the rest of your p.c.
I have tried this on 3 hdd. It has never worked lol. My colleague reckons he's got it working once long enough to grab some photos off and I doubt he would lie.
It might be worth a try if the data is important and your just going to bin it.
Well ofc I'm not going to bin the drive xD I know by experience though that recovering a hdd drive isn't an easy process. I'm pretty sure the data inside got corrupted anyway, but you know, I'm keeping it just in case.










