Different classes of SD cards

[pdaniel219]

I've read a little about different classes of SD cards. 2, 4, 6, 10. . . My question is, does it really matter? Will a lower class card fail? I've got a class 4 8g card right now. Didn't pay ANY attention to the class when I bought it. I'm gonna grab a 16g, but I'm not sure if I should pay extra for a higher class. I've heard both opinions, that the higher class is worth it and that it didn't really matter unless you're storing videos on it.

[jntdroid]

I've had really bad luck with Class 10's in my recent Moto devices (Razr M / Razr Maxx HD). Could've just been the brand... I don't believe the phones are capable of writing at those speeds anyway. It might be faster when it's plugged directly into your computer, but as far as the phone's functionality, I think Class 4 should be fine.

[diablo81588]

Do not buy a class 4 card. That's what comes with phones and they're very slow. I would recommend a class 6 or higher. You can get class 10s on amazon gold box deals occasionally for very cheap. Never had problems with class 10 cards. I would stay away from generic brands and stick to known like Sandisk, PNY, and patriot.

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[pdaniel219]

Awesome! Thanks guys! I appreciate the input. There are just some things I've never paid attention too. I'm sure I'll have more questions now that I found this forum. You guys rock.

[war88]

Class 10 Sandisk card won't work correctly in my M. I was advised to go to a lower class, according to Motorola, they didn't test anything higher than a class 4 on the M before they released it.

[GoCliffGo05]

Class 10 cards crap out on the M + HD... class 4 is the best bet.

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[diablo81588]

Well that's sad, class 4 cards are garbage. Class 10 works great on my phone.

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[GoCliffGo05]

Class 4 works flawlessly... to most people they won't notice the difference...

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[diablo81588]

Class 4 works flawlessly... to most people they won't notice the difference...

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There is a big difference.. Anyone who does backups, whether that be with titanium or do nandroid backups with recovery, will notice a major difference in write times. In addition, transferring files over USB will be dramatically faster. My phone came with a class 4, and I currently have a class 10. No problems for over a year and a major improvement in speed. You obviously have never used a class 10, or bought a cheap one with low transfer speeds.

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[GoCliffGo05]

Careful. I have used class 10... it doesn't work for our phone... I'm saying the common person won't notice the difference. That's all... I'm not disagreeing class 10 is better, I'm simply saying a class 4 will work fine for most.

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