Because Western Digital bought HGST and is no longer making HGST-branded drives? That said, there are some at NewEgg still - but they don't get very good reviews compared to the comparable WD and Seagates. For 3.5" internal drives, WD Black is still my recommendation. Though I must admit I'm not using big drives much any more, except for one or two drives over 4TB. Much prefer the portable options from Seagate (even have a 5TB model) and my real faves - the Samsung T5 SSDs. Of course, the latter aren't cheap - but now much cheaper than my first Samsung T3 was!