I am going to buy Sanho with HGST drive, i found 1TB drive at good price on BH, the reviews shows great positive comments about this drive, and it is fast, i don't care much about battery longevity because simply i can buy 1-2 more batteries as backup and charge them all, but the only thing i am worried about is if that brand of HGST is reliable and not much issues from customers used it.
HGST is owned by Western Digital, who have been making hard drives for decades. The only drives I would avoid these days are the generic (no name) drives that are sold on eBay, although apparently Seagate has had some issues.
Note - the chart is for all drives, including the 3.5" commonly found in desktops.
Manufacturers of 2.5" hard drives, knowing that they are used primarily in portable devices, do a good job with shock proofing. As a result, the reliability across most brands has remarkably improved over the years. If it works out of the box, there's an excellent chance it will work for years.
As long as you don't use the Sanho as a frisbee, you should be fine.