Astor wrote:Danke
Sorry, I will answer in English as my deutsch is not that good.
I have a very similar notebook N71JQ-A1.
The only difference is that mine has 2 Seagate 320GB@ 7200rpm Hard disks and a Blue-ray drive.
I have made some upgrades to my N71JQ notebook by myself.
I have upgraded from 4GB to 8GB DDR3-1333 RAM from Samsung.
I replaced the Aethoros WLAN card by intel WiFi 6200.
I think X77JQ is same notebook as N71JQ-X1.
Like N71JQ-X1 the X77JQ has also a place for a second hard disk, but most probably it has no sata interface adapter included. Which means it is not possible to build in a second hard drive later. So far it seems that you cannot buy such an adapter and build it in by yourself.
If you need more info you can visit this specialized forum. You will find answers to lot of questions about this notebook there. The following thread is created by people who own a notebook from this series:
forum.notebookreview.com/showthread.php?t=457176