[Q] A micro sd question

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I been reading that the forms about the different classes. Are there difference between max read/write speeds and max sustained speed? What class would be better for movie, stuff like videogame rom storage and music ?

Originally Posted by kipliq

I been reading that the forms about the different classes. Are there difference between max read/write speeds and max sustained speed? What class would be better for movie, stuff like videogame rom storage and music ?

A class 4 is considered plenty for smart phones and similar electronics. Though our phone, as most newer phones, can take up to a class 10. Higher the class - the better the transfer speeds.

Class 10 is supposed to have a minimum of 10mbps and a high of 22mbps. In general the class numerous indicates minimum transfer speed. The better the brand, the better the sustained read/write speeds. Though class speed does not mean it will not go over the high end of it's transfer rate. Some class 6's (6mbps min transfer speed) have topped out around 30mbps. Again, the better the brand, in general, the better the 'past minimum' speed performance.

Though class 10 cards are a bit more expensive, and not obviously practical, unless you were getting it for having the OS run on it, like cm7 :), but even then, as most people don't have their cm7 running on a class 10 sdcard and no one is complaining about slow performance.

I'd recommend putting the money towards a lower class 64gb card. As long as you format it with fat32, and ideally 32bit sectors, the phone will recognize it, giving you a stupid amount of available storage.

Sent from my páhhōniē

Another time class 10 cards can make a difference is if you take a lot of photos and video and save them directly to the external SD card. Especially if you are taking HD video.

I use a Class 6 and it works great.
I noticed a much faster upload speed to the car compared to a Class 4 and 2 so there is some truth to the Classes.

You know, you can also use SD-Booster app to change the cache your card is set at. To test, open your gallery and watch how it loads the pics. The app will show you what the cache is currently at. Then use SD Booster and change the cache. Go back and look at your gallery. I have a class 2 16gb but have the cache at 3072. Works great!

Sent from my SAMSUNG-SGH-I777 using XDA App

What does that app do exactly? Is it altering the card or something on the phone to speed it up?
It's telling me the 2048 is too high for mine.

Sent from my Samsung GT-I9100

Amazon has a 32gig sandisk for 35.99. And if you sign up for 'prime'(free 30 day trial) they will 2nd day air ship for free. You have 30 days to cancel the prime. Mine will Be here tomorrow.

Sent from my SAMSUNG-SGH-I777 using XDA App

Originally Posted by la5794

Amazon has a 32gig sandisk for 35.99. And if you sign up for 'prime'(free 30 day trial) they will 2nd day air ship for free. You have 30 days to cancel the prime. Mine will Be here tomorrow.

Sent from my SAMSUNG-SGH-I777 using XDA App

Students get two years free Prime membership. Heads up for anyone in college here.

Sent from my Samsung GT-I9100

They changed it to six months

Sent from my SAMSUNG-SGH-I777 using XDA App

I wasn't sure if I would really put to use the higher read/write speeds, but I bought a ADATA 32GB class 10 uSD card from Newegg that got mostly good reviews.
"ADATA 32GB Micro SDHC Flash Card with Adapter Model AUSDH32GCL10-RA1"
I'm getting about 14MB/s write and 21MB/s read (see attached picture).