Thank you all for your replies
I have thought a different approach, please read carefully the following if you think is more convenient for me:
Aside from backing up huge data from hard disks partitions to BD-REs (as I've said in my first post), also I'd like to rip my personal collection of commercial blu-ray movies to external hard disks for my convenience. Well, I've read the new LG drives are riplocked and this is not good for ripping, because of the speed limit. So I've thought a different approach but I'm not sure if will work.
You already know I need an external writer, but I've seen some USB 3.0 to SATA III adapters which can connect an external SATA/ATAPI drive to an USB 3.0 port, reaching the theorical peak of 5Gb/s. My only concern is that my motherboard has no native USB 3.0 ports, so I'm currently using an USB 3.0 PCI-E expansion card with the NEC chipset and I don't know if I will have any issues connecting an INTERNAL blu-ray writer with my expansion card, i.e., not being able to burn BD media up to 14-16x speed.
If you think this is the way to go, would you recommend the Pioneer BDR-209DBK for my needs?
Thank you again for your patience and for considering my urgency.