Upgrade Question on Hard Drives

Hey guys love the site and appreciate all the feedback you guys have given me over the years. I have a question. I'm about to get my hands on a new Premier Series 4 TiVo with 4 Tuners. It still has its original 320 GB hard drive in it. Will I be able to straight up swap it out with my WD10EADS 1 TB hard drive from my Series 3 TiVo that I have right now?? I'm trying to avoid having to use any software or Sata to USB cables. I'm not the most technical savvy on this stuff. I guess what I'm saying is will the Premier be able to work and function normally if I just take the normal hard drive out and put in this WD10EADS hard drive in it?



Thanks a lot guys for responding to my question.



Jason