I had five Seagates fail in my Synology NAS in less than a year. Somebody suggested it was a "bad" firmware on that model, but I switched to WD and haven't had a single failure since.
This will probably jinx me, but I've had so many drives, many purchased on the cheap from Fry's Black Friday sales when I was a poor university student, and the two drives I've ever had fail since I started buying over twenty years ago were
1. catastrophic flood in my apartment when drive was on the ground
2. a drive in an external enclosure on the ground that I kicked by mistake while it was spinning
Did you purchase them all at the same time from the same store? I've had a batch of SSDs fail from the same vendor / mfg timeframe. I started ordering a couple here and there form different vendors where possible. So far i've been lucky to get drives that aren't from the same batches. I tend to buy Exos from seagate and WD gold though so there's a bit of a premium tacked on.
No, that's the weird thing. Even the RMA models were failing. But sure enough, it wasn't just some incompatibility with the NAS because I tested them on PCs to confirm they were failing, and they were.
I had a similar experience. I ordered four EXOS drives three years ago and one of them came DOA. They had to send me three more drives before I got a working one. I’m amazed they’re all still happily humming away in a Synology.
What models? There's a big difference between the cheapest and the more pro models.
That said, my four 2Tb Barracudas still going fine after many years (10+). One failed, replaced with a green. Big mistake, that failed quickly and I went back to standard Barracudas.
I've had terrible luck with those drives, out of 12, 10 failed within a couple of years. Not a same batch issue as they were purchased over the period of about 6-8 months and not even from the same place.
Yet I've got Toshibas that run hot and are loud as heck that seem to keep going forever.