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SSD vs HDD for data security

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Lately, SSD prices have been catching up with traditional HDDs. Soon, SSD solid-state drives will be the cheaper option for data storage. But if we look at it from a security perspective when it comes to storing valuable data, which option is better, an SSD or an HDD?

SSD 2Tb  Crucial P3 2TB M.2 PCIe Gen3 NVMe SSD ~ 91 €
HDD 3Tb WD Red ~ 87 €

I am speaking as a home user. I don't have a dedicated NAS with RAID 5, just several HDD drives for the computer and for backup.

SSD are significantly more reliable than HDD.

Main thing is SSDs typically die with little warning but that should not matter too much as you should follow 3 2 1 backup if you actually care about security of your data. All data storage devices can fail as well as your house can burn down, hit by lightning, power surge, water damage, theft etc.

Whilst they may be slightly price competitive at 2TB levels they are not even close at larger sizes.

You don't want to leave SSD unpowered for more than 6 months, and certainly not for years. Especially if it uses QLC NAND. Otherwise good SSD should be more robust.


--- Quote from: Picuino on September 23, 2023, 07:03:36 pm ---SSD 2Tb  Crucial P3 2TB M.2 PCIe Gen3 NVMe SSD ~ 91 €
HDD 3Tb WD Red ~ 87 €

--- End quote ---
If you look at 8TB+ price, SSD price is nowhere near to HDD though.

Yes you should consider the SSD type being SLC, MLC, QLC etc. Most is moving towards QLC these days but if you go for proper enterprise drives with even higher expected reliability your cost comparison goes way out of the window. A QLC SSD should still be more reliable than a HDD.

As some stats from BackBlaze


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