So I got my Seagate Exos X14 12To HDD (X16/X18 can also be found in other countries) refurbished.
It was indeed new, or seemingly so anyway.
The Good:
Seems in pristine condition, CrystalDiskInfo just notes it as "Good" (I.E 100% functionality)
Is fast, we're waaay ahead from old HDDs I left behind 10 years ago
I've tested it with images and videos, there is indeed a lag with images, they appear extremely pixelated for .1s then load in full quality, it's not significant but annoys me enough that I've elected to leave all my images on my SSDs. For videos though, I can't tell the difference, or it really isn't significant enough for me to care. I dumped years worth of external and internal SSD's worth of data (about 1To and some?) and freed a ton of space, then watched some of the vids off the new drive. Whether just loading them into VLC or skipping around different parts, I can't see any significant speed difference.
Since I wanted to have a much larger storage pool for longer videos but didn't want to see lag, this works great. Dumped basically all my older videos/films/animes and can just read it from there without any care. I was also aiming to have better video recording quality despite it getting pretty heavy (8Go per hour for 4K on an RDNA 3 AV1 encoder at OBS CQP 20). Now that I have very high amounts of storage, I basically don't need to care about quality levels being too high, if the GPU can take it, the HDD can take it.
So its all win this way. And for 12To for 135€ I'm reaaaaaally happy about it.
The Bad:
Buzzing (light but constant when on)
Heads making occasional clicking noises
Windows randomly waking it up
I spend most of my PC time on the internet and not in my files. So the HDD will typically go to sleep some time after being used, but while it's still on, you can hear a distinct buzzing noise from my typically extremely silent PC. It's not "deadly", but yeah, I had a perfectly silent unit and now don't. Kind of a mild downgrade, but I can live with it being buzzy if it's constant, and it is. Random head noises are a bit different but they're rare, we're talking some random noise once every 15-30 mins for no discernible reason.
The real problem is Windows. For some times, it'll randomly wake up the drive despite me not using it. When it does, it's a bootup clicking fanfare (I don't mind much) and it's wear of the drive that I wish didn't happen randomly.
Also, Windows used to do this EVERY TIME I would load up file explorer. Because the drive was my F:, and would appear in the list of drives in the system. So I couldn't open file explorer without starting 20-30 mins of buzzing and booting a drive I wasn't going to use.
Quick fix I've gone for: removed the disk's mounting point as F:, created a "Storage" folder, and put the mounting point inside that folder. Seems to prevent it from starting all the time due to a random check by Windows.
Windows will still randomly start it sometimes (I imagine for updates or some crap) but at least I don't have to worry about it being started just from FE. Also, it's not starting on coming out of PC sleep, so I can just start the PC in the morning and not worry about buzzing or anything. I'll have to attach it a bit more securely and hope the buzzing gets less obvious (it's kind of laying rather than being screwed in rn).
Overall I'm pretty happy. It's a (hopefully) really high quality drive that'll last me a long time, helium sealed and all. I don't have to worry about running out of storage space in the next 5 years even if I record hours of video every week, and there's no significant speed drawback for the files that actually take large storage like movies. Could put games too, but they'd load slow. Images are more of a mild inconvenience than a real problem, they'd work well enough. The noise is a significant drawback, but I'm hoping my mitigation strategies to not start the drive all the time for naught will play out well.