2nd hdd in single hdd Lorex DVR?

[Spanked71]

Hi all, 1st post. I was wondering if I could add a 2nd hdd using data and power splitter cables because my system only has a single connection for 1 hdd. I did connect a surveillance hdd with powered connection to the USB in rear of dvr and it did work for real-time backup. Just want to increase the amount of recording without having to buy a larger capacity hdd.
Thank you.

 

[Twister]

You can get 6tb on eBay for $150 or so new and clean used ones for $65. As for what you want to do, more headaches than it's worth imo. And the hdds I got are Seagate Skyhawk.