Can you pop the HD and copy files?
It's better to just save the files to a NAS if you want to distribute them to other devices later.
I use my computer to put the movies into digital files that I save on my NAS. I use Akrock to rip the discs. If you want to capture over the air broadcasts, you can add a tv card to the PC and add an antenna or a cable input, save the shows on the HD or SSD and upload them to your NAS.
DCX3400M is HD cable box with DVR...Yes, I answered that it is better to use a PC to record the shows and toss the DVR in the trash bin because it is encrypted and low res that gets upscaled.