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What Is The Difference Between SSDs And SD Storage Cards?

by Ace Damon
What Is The Difference Between SSDs And SD Storage Cards

Storage, the big question: what is the difference between SSDs and SD cards?

At first, SD and microSD cards appear to have a larger storage capacity than a regular SSD.

In other words, they seem to offer a higher capacity of data to the same volume, something like a greater “density of data,” is not it?

Is that the case? Let’s learn more about this in this article.

SD vs. SSD

The truth is that SD cards and SSDs are not that different so, in the end, being reasonably similar technologies.

However, while SD cards even offer up to 1 TB of storage, SSDs are up to 60TB in capacity.

Of course, we are talking about extreme cases, since conventional SD cards offer 128, 256 or even 512 GB (and these are quite expensive), while “common” SSDs offer up to 4 TB of capacity.

That is, they do not bring sizes so different if we consider the capabilities of each one.

SD cards with 128, 256 GB are common, as well as 4 TB SSD.

Capabilities aside, SSDs are generally larger for three reasons: caching, cooling, and format standardization.

The first explains the considerably higher speeds of SSDs, which reach 550 MB/s (SATA III) or even up to 3500 MB/s (NVMe).

The “fast” SD card offers speeds of 100 MB/s, and this difference is due not only to the cache but also to the cooling structure itself.

SSDs do not have to be “as big”: they are only adapted to different formats.

SSDs offer more room for cooling, in addition to commonly having passive cooling structures.

It is a way to take advantage of the space of the standardized format itself, such as the 2.5 “SATA III SSDs, which is the third reason.

SSDs do not have to be “as big”: they only take advantage of the format space used on most machines.

They often use only part of the area they can handle.


A SATA SSD does not need all the space.

It is tailored to the 2.5 “SATA format, such as notebook PCs.

Another interesting point is that M.2 SSDs are not “as big” as SD cards.

Although SATA models are the most common, M.2 is slowly gaining ground not only at higher speeds but also because it does not “need as much space.”

Still, it needs the connector, cache, and disk emulation circuitry, but it’s still not as big compared to an SD card (even more so because M.2 offers larger capacities).

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