I actually don't know if the 2TB would have worked with TE3. My TiVo was completely stock/unmodified with original 3TB drive until it failed. That's when I tried with a 2TB I had on hand - it had never been in a TiVo before - it was a spare out of a computer where it had been replaced with a SSD. It behaved the same way with the 2TB as it was doing with the stock 3TB drive - TiVo logo appears on TV, disappears, then all 4 lights start flashing. It actually surprises me quite a bit - back with my original Humax Series 2 back in the day you would know the HD was failing, it would sound awful, you'd hear it spin up/spin down, clunk, clunk, you'd have glitches navigating around. Clear warning signs something was failing. With this Bolt+ failure it had no signs of anything wrong before hand. No glitching, no odd sounds coming from the drive, just went from working fine when I went to bed, to completely dead when I woke up.