Use to replace the 1TB drive that was in my Directv HR54 Genie DVR. Worked great. Fast and reliable.The Drive is optimized for video. It did make a huge difference and improvement.It was easy to install in the HR54. It’s so much faster than the 1TB that was in there.I’m glad I did. I was tired of running out of space.I used to use the Esata port but noticed some slowness issues when recording and trying to watch on a couple of TVs.I cloned my external 4tb on to this one and put it in the DVR. It was easy to open up the hr54. Not like the hr24. I’m glad I did. Runs great. No slowness or lag when scrolling down the list of recordings. Plus it boot up in 2 minutes instead of 5-6.Awesome.