I've bought 1TB external USB HDD (like this http://www.pixmania.com/pl/pl/111194...netrzny-3.html but 1 TB not 2 TB). After some time some problems with connection to my PC occured and I thought that the only solution is to check HDD connecting internaly in PC. After I opened this device I saw yhat in fact there are 2 HDDs inside (each 500GB).
I decided to keep them separately, I placed first in PC and PC still saw it as 1TB wgich was strange because in fact it had 500GB. I formatted it and now it works and PC sees it as 500 GB.
Problem is with second disk. PC doesnt see it at all. I cannot format it.
I attached disk info and photo of the external HDD after I removed the disks.