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View Full Version : SD card class? What does it mean


wannab20hatch
03-03-2009, 05:34 PM
Well after looking into a new ipod/zune i decided i would just upgrade the micro sd card in my BB. Im looking for an 8gb card and i keep seeing different class numbers on them. what does the number mean? which one should i get?
Ch0psticks11
03-03-2009, 05:41 PM
you referring to the circled number at the top right hand corner of the card itself? i just now noticed it after reading this, lol. idk what it means but mine is a 2 and works in my BB Bold. just go to your cell service provider store and buy one from there. i'm sure they wouldn't sell you a micro sd card that wouldn't work in their phones.

i got someone at work who used to work for sandisk, i'll try to ask him and see. but if anybody knows, i'd like to know too :D
Paul
03-03-2009, 07:49 PM
it has to do w/ speeds and min speed rates:

* Class 2: 2 MB/s - 13x
* Class 4: 4 MB/s - 26x
* Class 6: 6 MB/s - 40x
wannab20hatch
03-03-2009, 08:12 PM
well my new BB curve doesnt use SD HC cards and i cant find anything over a 2gb card. my phone came with 1gb so its pointless to get a 2gb. anyone know where i can pick one up. i tried best buy, frys, amazon, newegg, and walmart
Barefoot
03-03-2009, 08:12 PM
:goodjob::goodjob::goodjob::goodjob:
it has to do w/ speeds and min speed rates:

* Class 2: 2 MB/s - 13x
* Class 4: 4 MB/s - 26x
* Class 6: 6 MB/s - 40x
obear
03-03-2009, 10:09 PM
well my new BB curve doesnt use SD HC cards and i cant find anything over a 2gb card. my phone came with 1gb so its pointless to get a 2gb. anyone know where i can pick one up. i tried best buy, frys, amazon, newegg, and walmart

Whats the exact model of the phone?
wannab20hatch
03-03-2009, 10:15 PM
BB curve 8350 i found a card on ebay just now its a 4gb for 14 bucks but id like a 8 or 16gb if possible
Ch0psticks11
03-04-2009, 02:24 PM
your curve should use a micro sd card. idk of a curve that doesn't
wannab20hatch
03-04-2009, 04:38 PM
It does have a micro sd card but not an hc card and I can't find a regular msd card that holds more than 2 gb
Ch0psticks11
03-04-2009, 06:31 PM
idk if this helps but i work @ at&t we sell the bb 8310 & 8320 curve. and all we have are micro sd hc cards to sell to customers. idk if it's just ours that can use the hc but we haven't had any problems with the cards in our curves.
wannab20hatch
03-04-2009, 07:33 PM
i gonna try and HDSC card and go from there. i think my brothers phone has one.
wannab20hatch
03-05-2009, 12:08 AM
my brother doesnt have an HC card but...from searching some BB forums if your BB has the 4.6 o/s you can run up to 32gb card. at least thats what people are saying. guess ill just order the card and if it doesnt work ill sell it.

* BlackBerry Device Software 4.2.0 Up to 2GB microSD
* BlackBerry Device Software 4.2.1 Up to 4GB microSDHC
* BlackBerry Device Software 4.2.2 Up to 4GB microSDHC
* BlackBerry Device Software 4.3.0 Up to 8GB microSDHC
* BlackBerry Device Software 4.5.0 Up to 8GB microSDHC
* BlackBerry Device Software 4.6.0 Up to 32GB microSDHC -
obear
03-06-2009, 11:59 PM
Yeah, I just got a 16GB micro SDHC if you want to meet up near me and see if it fits then you can. I got mine off amazon for about 50$.
Jecht
03-07-2009, 01:09 AM
SD Speed Class Ratings

SDHC cards have SD Speed Class Ratings defined by the SD Association. The SD Speed Class Ratings specify the following minimum write speeds based on "the best fragmented state where no memory unit is occupied":[19] (http://en.wikipedia.org/wiki/Sd_card#cite_note-SDHC_speedclass-18)




Class 2: 2 MB/s - 13x
Class 4: 4 MB/s - 26x
Class 6: 6 MB/s - 40x
SDHC cards will often also advertise a maximum speed (such as 133x or 150x) in addition to this minimum Speed Class Rating. See section Speeds (http://en.wikipedia.org/wiki/Sd_card#Speeds) above for a further explanation. One critical difference between the Speed Class and the maximum speed ratings is the ability of the host device to query the SD card for the speed class and determine the best location to store data that meets the performance required. "Maximum speed" ratings are quoted by the manufacturers but unverified by any independent evaluation process.




Its just talking about the absolute minimum speed. They usually run a good bit faster, but they all have different read/write speeds so they don't advertise the max read/write speeds.
wannab20hatch
03-07-2009, 03:10 AM
Yeah, I just got a 16GB micro SDHC if you want to meet up near me and see if it fits then you can. I got mine off amazon for about 50$.

thanks for the offer. i found out that an HC card will work.nextel is just to cheap to put one in the phone from the factory.

i got a sandisk on ebay with reg SD and usb reader for 55 :)