This is a Hitachi 2 terabyte hard drive. It is a SATA 6Gb/s, 7200RPM drive.
I bought it in early 2011 and it was in my NAS for several years. I upgraded around 2016 and it's been sitting on a shelf since then. It tested good - I recently plugged it in, copied data to and from it, and formatted it. Translation of my writing on it: It is good, it came from the right side of my NAS, it is a 2T drive, and there's nothing on it that I need to save.