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this post was submitted on 06 May 2024
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Ok i never fully understood how classes worked . Do they only increse speed which i don't care for ? Or do they increase cycles and life ? If so why don't they just tell you that or make the long life sd's the standard, why sell a cheaper ones ? like everyone buying an sd is counting on it lasting right ? People like me who just goes to a shop buy an sd with the storage we need and get out don't think about classes or anything .
In my experience it kind of means both. You get more speed obviously, but that comes with better quality materials and control processes at the manufacturer. People expect the $5 SD card to corrupt eventually, they get more upset when the $40 card does.
I'd be actually willing to pay more if it does increase lifetime . I think my old sandisk which was not even that pricey is on its 8th year idk why it is lasting that long maybe because its always not in a device like my new ones ? Does that matter ?
I'm hardly an engineer, but I'd say the less movement the card takes, the better. SD cards are pretty old tech now, so there aren't many improvements to be made anyway. Cheap card, expensive card, as long as the contacts don't corroded or constantly get worn, I don't imagine they fail often. Photographers probably eat through them because of the transfer processes or people using them with phones/handheld games because they're always inserting/removing them. If it just sits there, it's just getting power and losing it, so it's squarely on the internals and no physical wear.
I've had the same cheap card in my dashcam for almost 5 years now, and it's never failed. High and low temps every year, but I attribute it's longevity to never removing it ever lol.
The class rating is more about data rates though to achieve higher speeds you tend to need to manufacture to a higher tolerance.
I tend to install a lot of these for media playback so a higher data rate to me is preferred.
In my experince ive only known 4-5 cards to die in the last 5 years.
Although sd cards have limits for write cycles in data sectors and theoretically have unlimited reads. When cards have failed for me in the past they are undergoing high read rates to the same sector.
A1 is recommended for compatibility and performance.
https://www.kingston.com/en/blog/personal-storage/memory-card-speed-classes