Seagate as a manufacturer is far from reliable. It's drives mechanically poorly designed, and once they starts to go downhill, they does so very quickly, develops bad sectors on their own due to their weak heads. There are a number of common drives that are similar to this reliability and fragility-wise, though nowadays their Rosewood series is one of the worst contemporary drive families. I met a few before, almost all of them suffered from weak heads problem. If the drive not showing up in BIOS / UEFI then it's likely a drive's hardware failure. If this is the case, you can't do anything other than take a drive to a nearby data recovery company because it's internal firmware or the heads / preamp related failure which has no D.I.Y. solution.
This is not the mindreader course. If you want someone to help, then please be more specific: what drive and computer is it exactly? What happened to them before the accident? If you're not sure about the models, take good quality photos from their stickers! And add your location (city) for anybody who is here from your neighbourhood and can manage this task. I think it would be worth rewriting your post by specifying your location and expected job to make it easier for anyone who can help to notice.