Passport elite 500gb says needs to be formatted. It has 300gb full! how do I get my files?

I’m having the exact same issue with my 1TB passport essential SE. I bought it a few days ago and it was working good. And then tonight it randomly corrupted some data. I eject it properly, plug it back in, and suddenly the whole drive is corrupt and needs to be formatted? I’ve had a Seagate external that’s been running flawlessly for years and this thing corrupts all my data in less than a week? Way to go WD…