Sorry for late reply, got busy
I've always used WD HDD's and before SSD's, Velociraptors were my system drives and they have never failed me I still have 5x 1TB VR that are filed with data now, they are been put away I only start them from time to time, maybe every 12 months or so, they are about 8-10 years old and not 1 have single bad sector.
Going of topic..... I got 4x 6TB Blacks and at the time they were the biggest capacity mechanical drives, than the 8TB Helium came out and right after that the 10TB in which I got 2 of them. At first they would run nice and cooler than my Blacks, noise level was the same but that was no big deal I always set my drives to turn off after 5 minutes, but after 2-3 days I know this they would sound much louder and making strange noise, at first was only one than day apart both where doing that.
As I said I don't care about the speed and noise but the worst part was that after week the speed of both of them dropped to half and noise became an issue.
My theory is that the Helium will leak sooner or later, it's like water, in sealed system once it find its way through crack, even the smallest crevasses it will go all the way, just a matter of time.
Canada's WD RMA department was awful, they are not the same that they were few years ago, even if your drive is week old, they will send you recertified drive over and over again for the duration of your warranty.
When I spoke with the supervisor and asked him about 30 day policy of getting brand new drive, he was trying to dance around the subject I understand if the drive is past the 30 days but that was one awful experience.
I am heavy user of HDDs and unfortunately there isn't much choices for now and as I said the Blacks have served me well for over 2 decades, but as soon as there is something better by different manufactures I won't hesitate to give them my business I am quite turned off by WD warranty tactics, it's all good on the paper, look at Canada Computers for my review I said my piece,
I have used Samsung SSDs for a few years now I have 2x 4T that are tortured on daily bases I override them with my windows Images over again, one of them has actually over 1100 write cycles and it's still in 100% health.
I hope Samsung will come up with big and affordable SSD but don't get me wrong I still love my 6TB Blacks and I think the 6TB are still the latest best conventional drives before jumping to Helium, which in my opinion are not that good.
Put it this way, traditional HDD e.g. Black has 5 year warranty, but with my experience they last 5 years and up, Helium has 5 years warranty and once the helium vanishes grrrrrr I don't think you can do much.
If you have the means and need the storage I would get the 6TB while they are still available I would not trust Helium........Edited by NewUser16 - 10/3/17 at 11:29am