Hey there again, @Havishka!
Can you please check the Disk Management in your Computer? I've shared a tutorial in my previous post that can guide you how to access the utility in Windows. Posting a screenshot of it would be really helpful, so that I could see exactly how the external HDD is recognized there. Do you have any important files onto this external drive or is it a brand new one? When you go to Disk Management in Windows and if you see the external drive listed there (usually it's the last drive on the listed volumes), make sure you also try right-clicking onto it to check WHAT are the given options.
If you do have important files onto it, make sure you back them up somewhere else as soon as you gain access to them.
Keep me posted.
SuperSoph_WD