Thanks for trying iDrive, but the error persist. I have tried on both MAC and PC to make sure that was not the cause, and the samething happens as described before.
sorry iDrive, I thought that I had forund the backup solution for my future NAS needs, but luckily I didn't sign up for anything but the free membership initially so I only lost my time and no money ... I was in need for +1TB btw.... :(