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TYTN II

I'm picking one of these magnificent devices up in the next couple of days and was going to pick up the largest microSD card I could get. However, while looking for the cards, I am seeing microSD and microSDHC.
What is the difference?
Thanx.

Found this here (info copied to the bottom of post)
http://en.wikipedia.org/wiki/Secure_Digital_card#SDHC
Which I think explains it but doesn't really help you. But I think this thread will:
http://forum.xda-developers.com/showthread.php?t=329777&highlight=sdhc
**************
"SDHC
8GB SDHC cards
8GB SDHC cards
An extension of the SD standard, SDHC (Secure Digital High Capacity, SD 2.0), allows capacities in excess of 2 GB. SDHC cards are often formatted with the FAT32 file system, which supports partition sizes greater than 2 GB.[11] It uses the same form factor as SD, but the SD 2.0 standard in SDHC uses a different memory addressing method (sector addressing vs byte addressing), thus theoretically reaching a maximum capacity of up to 2048GB. SDHC cards only work in SDHC compatible devices, but standard SD cards work in both SD and SDHC devices. The SDHC trademark is licensed to ensure compatibility.[12]
SDHC cards have SD Speed Class Ratings defined by the SD Association. The SD Speed Class Ratings specify the following minimum sustained write speed on to empty SDHC cards:
* Class 2: 2 MB/s
* Class 4: 4 MB/s
* Class 6: 6 MB/s
[edit] SD and SDHC compatibility issues
As of early 2007, the simultaneous availability of non-standard 4 GB SD and 4 GB SDHC cards, and incompatibilities between SD and SDHC have caused confusion among consumers buying memory devices.
SD and SDHC cards and devices have these compatibility issues :
* Devices that do not specifically support SDHC do not recognize SDHC memory cards.
* Some manufacturers have produced 4 GB SD cards that conform to neither the SD2.0/SDHC spec nor existing SD devices."

Thank u 4 your input, mattarse. Good 2 know that the Kaiser will support ANY microSDHC card. Thanx 2 that, I ordered an 8GB microSDHC I saw on techdepot.com this morning (http://www.techdepot.com/pro/product.asp?productid=5699101).
Thanx again!

stmasi said:
Thank u 4 your input, mattarse. Good 2 know that the Kaiser will support ANY microSDHC card. Thanx 2 that, I ordered an 8GB microSDHC I saw on techdepot.com this morning (http://www.techdepot.com/pro/product.asp?productid=5699101).
Thanx again!
Click to expand...
Click to collapse
Just a post to confirm that the Kaiser works perfectly with that Sandisk 8 GB micro-SDHC. I now can carry the full Tomtom Europe maps and the full Wikipedia and still have 2 GB free.

Superb choice. I have a Sandisk 8gb MicroSDHC in mine.

(Suddenly feels inadequate with his lonely 4GB microSD card...)

Any news on when the 16Gb and 32Gb microsdhc cards are coming out?

NotATreoFan said:
(Suddenly feels inadequate with his lonely 4GB microSD card...)
Click to expand...
Click to collapse
We always want (need?) more. I have my 8 GB which is never full, depends on the use of course, if you're always on the way, you want to watch films, ok your sd will be full.
Now I'll also use as mp3 player, sure I'll complain it's not enought . Hope to see 16 GB asap hehe.
(want 32GB...what I have to wait ?? )

12 GB Micro SD

Does Anyone Know If It Can Take A 12 GB Micro SDHC If So Theres One Here For £35
http://www.flash-memory.co.uk/products/1031/sandisk-8gb-micro-sd-sdhc-card.htm

it is 8 gb not 12,
at least its what i see.
i have an 8gb and its the max i guess so far.
it will be available a 16gb in summer, i guess its still in lab

8 gb i c as well. Yeah, it will support up to 32 GB, but that wont be until next year. Plus, there is no way i need more than 8 GB. ..... Maybe 16 at MAX

It says 8gb then later says 6 gb, wonder what it really is?
Sandisk 8GB Micro SD (SDHC) Card
Part Number: SDSDQ-8192-E11M
SanDisk is proud to announce our newest format and capacity to the SD card family: microSD High Capacity (microSDHC) 6GB flash card. Included as bonus is our new MicroMate™ SD/SDHC compatible, high-speed USB 2.0 Reader! This will help ensure your transition from the microSD format to the... Read more...

6 GB Sandisk
I have the 6 GB Sandisk and all is fine except that I can't save the camera photos on it

6gb Sandisk microSDHC
Im also using a Sandisk 6gb microSDHC in my Bell Vogue and its working fine all the way, no problem at all.

I was thinking about picking this up today
SanDisk - 8GB microSDHC Memory Card

I ended up buying a ADATA 8GB MICRO SDHC TURBO class 6 https://shop2.frys.com/product/5576250?site=sr:SEARCH:MAIN_RSLT_PG

8GB here, between the RAM, Main Storage, and the SD, I've got plenty of memory!

deepeyes that is a class 4... see the 4 with the circle around it... that indicates ur class speed

UHS-1 MicroSD

Dear readers,
I'm searching a for a new SD card for my HD2 for a while now and wanted to buy a 32gb class 10 microsd card from samsung.
But then i saw a new cards with new classes called "UHS".
I also saw one of them having the class 6 and the UHS class.
I have a few question regarding this:
1. Does this UHS class work on the HD2?
2. Is it possible for a card to have a normal class and a UHS class?
3. if not, are UHS 1 cards as fast as class 10 cards on devices that do not support UHS?
4. How can UHS 1 be cheaper then class 10?
adata 32gb micrsosd UHS 1: cant post url...
the same card for 22 euro's: cant post url...
samsung 32gb microsd class 10 for 26 euro's: cant post url...
I hope this topic will answer the the questions i think other people have too.
kind regards,
4rjan

Can't answer for sure if they are 100% compatible with HD2 hardware(there is certain hardware requirement for UHS), but in theory any speed after class 8/10 is pointless. Class 10 is close to HD2 hardware bandwith limit. You won't benefit that.

Nobody??

I was also looking for a 32GB class 10 card and found the UHS-i type, but in the reviews i saw said about compatibility issues in non compatible devices or transfer speeds relatively low in devices without UHS-i compatibility.
To avoid problems i purchased one Samsung Class 10 card, works perfectly in my HD2 and don't have to worry.

That is exactly what i thought, that the uhs-i has a lack of performance on not supported uhs-i devices and that they are not completely backwards compatible to normal class 10 speed.
Do you maybe have a URL of those complaints?

hardan said:
I was also looking for a 32GB class 10 card and found the UHS-i type, but in the reviews i saw said about compatibility issues in non compatible devices or transfer speeds relatively low in devices without UHS-i compatibility.
To avoid problems i purchased one Samsung Class 10 card, works perfectly in my HD2 and don't have to worry.
Click to expand...
Click to collapse
That would be expected for transferring relatively small files and using windows formatting as the random read/write speed (most frequently used) will be slower with a higher class, whereas the sequential read/write speed will increase. This may beneficial for users with WP7 but if you use it anywhere else it will seem much slower.
Sent from my T9193 using xda

But do UHS class 1 cards run ass class 10 cards when they are used with non supported UHS devices? If it is true what you guys are saying then its not.
I can't find anything about it on the English Wikipedia, but on the dutch Wikipedia it says it runs like class 10 on non supported devices:
http://nl.wikipedia.org/wiki/SD-kaart
UHS: MB (Megabyte) Mb (Megabit)
UHS Class 1 10 MB/s (min) 80 Mb/s (min)
UHS-I 104 MB/s (max) 832 Mb/s (max)
UHS Class 2 105 MB/s (min) 840 Mb/s (min)
UHS-II 300 MB/s (max) 2400 Mb/s (max)

Home » Frequently Asked Questions » Memory Card
WHAT IS UHS-1 ?
"UHS-1" or more accurately "UHS-I" stands for "Ultra High Speed" - 1 and is a speed class for SDHC and SXDC memory cards.
UHS-I is the fastest category of card available today with a bus interface speed of up to 104 MB/s.
An SDHC UHS-I card will work in any SDHC compatible device at lower speeds, but to take advantage of the UHS-I speed, a UHS-I compatible device is essential.

omidz said:
An SDHC UHS-I card will work in any SDHC compatible device at lower speeds, but to take advantage of the UHS-I speed, a UHS-I compatible device is essential.
Click to expand...
Click to collapse
the question is what are those "lower" speeds?

4rjan said:
the question is what are those "lower" speeds?
Click to expand...
Click to collapse
The speeds would be the Class 6 or Class 10 speeds, depending on what's listed on the card. Of course, even that can be bottlenecked by your device's cache.

UHS-I doesn't work nice!
I try to use a SanDisk 16GB class10 Ultra MicroSd HC-I but as I found out it doesn't feet with my HD2 EU..... ...Although it works very smooth and fast after some hour my phone just freezes....only the light of the hardbuttons works...screen turns black...I take off the battery...and all this sadness comes to my face...
So I got back to my Transcend 16GB class10 and everything works almost fine (a little bit slow sometimes, so I use sd card boost and swapper2).
You can see by yourself ...the mmc driver has not included UHS mode...

UHS vs CLASS
The UHS means it has content transfer speed of minimum 30mbps to maximum of 104mbpswhen you transfer the content from MicroSD to System(PC)....but the data write speed on the MicroSD depends on the CLASS mentioned on it i.e., CLASS 10 has MAX write speed of 10MB/S......(Note: all this speed transfer test will use top speculated system configurations so it may vary on our PC's).

Hello,
Just to echo what a few people have said elsewhere and clarify something. Using an SDcard with a UHS classification may well cause your HD2 to hang, black screen, freeze, crash .... especially when using certain ROMs. Some seem more resilient than others, but the NativeSD ROMs in particular rely heavily on accessing the SDcard. The only way to reset after a blackscreen is to remove battery and reboot.
The HD2 was never designed to work with these cards and they require specific voltages from the phone hardware in order to run correctly. The HD2 does not have such hardware. I used a Sandisc 16GB Class-10 UHS-1 card and my phone would hang/crash 7-10 times each day. After replacing it with a Class-10 Kingston card with no UHS classification, the phone runs fine. Nothing else was changed except the SDcard. The exact same installation was used by cloning the SDcard partitions. Consequently the phone runs fine now.
Just thought I'd post up in case it helps others.
Would appreciate if someone could mirror this post for me (I have less than 10 posts on XDA and don't want to spam the forum just to get them) on this thread for [ROM][4.1.2][720p] NexusHD2-JellyBean-CM10 V1.5 [NativeSD] because a few people were complaining of bugs and it's nothing to do with the ROM itself, more the memory cards they are using.

doctorasgr said:
I try to use a SanDisk 16GB class10 Ultra MicroSd HC-I but as I found out it doesn't feet with my HD2 EU..... ...Although it works very smooth and fast after some hour my phone just freezes....only the light of the hardbuttons works...screen turns black...I take off the battery...and all this sadness comes to my face...
So I got back to my Transcend 16GB class10 and everything works almost fine (a little bit slow sometimes, so I use sd card boost and swapper2).
You can see by yourself ...the mmc driver has not included UHS mode...
Click to expand...
Click to collapse
Use 32GB Sandisk class10 Ultra UHS HC-I without a single issue. Did want the mobile Ultra class 6 to be safe but sent me class10 UHS but worked out fine ...

Mister B said:
Use 32GB Sandisk class10 Ultra UHS HC-I without a single issue. Did want the mobile Ultra class 6 to be safe but sent me class10 UHS but worked out fine ...
Click to expand...
Click to collapse
:thumbup:
Enviado desde mi GT-I9300 usando Tapatalk 4 Beta

Very strange,i using a Sony 8GB UHS-1 and it works fine with all roms (dataonext,nativesd).I'm thinking to buying a Sony 16GB UHS-1

I am using SanDisk ultra 16Gb UHS-1 card without any issue for some time now with many different ROMs. I would rather bet that not original (Kingston, Sony, no names) that looks like original cause that.

guys what do you think about this card http://youtu.be/PuHfmuJ8pf0.... I am about to buy a new 32gb card for my new phone.
please give suggestions....

HTC HD2 Memory Cards - Question

As for these four memory cards, is that you recommend to the HD2?
1. SANDISK MICRO SD 16GB class 4
2. ADATA MICRO SD 16GB class 4 or ADATA MICRO SD 16GB class 6
3. KINGSTONE MICRO SD 16GB class 4

Sandisk because it has stable performance and more compatible than other cards on wp7

I personally used Sandisk for a very long time and continue to do so but i have recently swapped it out for a Transcend 8GB class 10. You can find it
on ebay here for $10.50. Read and write speeds are impressive and it works great for Android or to just have really. I don't use WP7 so i can't honestly
say if it'll work or not for that. A quick search in the WP7 Q&A could shed some light on it. I just couldn't foresee how it would even be a problem though.
Google the SD cards your interested but add the word benchmark to the end. This can give some insight on what cards generally have the better
performance and which don't. Higher speed ratings don't always mean better scores so look at the benchmarks and most important, the reviews.
If Sandisk is the card your most interested in i could sell you some of mine. I can't compete with China or knockoff prices but i could offer something
cheaper then what you might pay at Best Buy, Target or even Walmart. $8 for a 8GB sandisk class 4, $15 for a 16GB sandisk class 4 or both for $20.
Improtant warning about (some) sandisk cards. While shopping in the past i did see a lot of fake sandisk cards. I've always heard the easiest way to spot
a fake sandisk is buy looking where the speed rating is placed. If its off to the corner then it might be fake. It should be centered in the middle as all mine are.

Sankdisk, if not Kingstone.
Honestly, I'd go all the way and get 32gb. Thats what I did.

Sandisk, and buy only from certified OEM seller.
Any card from auction: 95% probability of getting fake one. They may work as original, or may not.

I recommend samsung 32GB class10.
Its effect is very good.
Sent from my NexusHD2 using XDA

HTC HD2 Memory Cards
Sandisk memory card has always been known for stable transmission performance, transmission rates and stability be recognized!
Sandisk is a high-end professional brands! ~ Now also launched more products suitable for the needs of the public a wide range of capacities of 4GB, 8GB and 16GB SanDisk brand memory card

SanDisk Extreme Pro microSDHC UHS-I card
http://www.sandisk.com/products/memory-cards/microsd/extremepro-uhs-i/?capacity=16GB
SanDisk Ultra microSDXC UHS-I
http://www.sandisk.com/products/memory-cards/microsd/ultra-class10-for-android/?capacity=16GB
do these sandisk card work with HD2?! !!

64 GB SD XC working !
http://forum.xda-developers.com/showthread.php?p=40204936#post40204936

i buy n use vgen 16gb class 10,can dual boot wp7 and android
now i buy vgen class 6 32gb,dual boot wp7 n android native,when i try to instal andro via magldr can see on sd card,but if process on android,i can't see sd card..
"please insert sd card"
how to fix it...

Which Micro SD card of Samsung?

I would like to buy a Micro SD card for my GS7E. I'm doubting between ''Samsung 128GB microSDXC Pro U3'' and ''Samsung Pro Plus microSDXC UHS-I U3 128GB''.
I'm just a student with low salaries. The price / speed makes me doubt. Is it worth buying faster card? I don't want to see any lagg and no performance loss.
Would be nice if someone can help me!
Samsung Pro microSDXC UHS-I U3 128GB
Price: €62,90
Read: 90MB/s
Write: 80MB/s
Samsung Pro Plus microSDXC UHS-I U3 128GB
Price: €79,90
Read: 95MB/s
Write: 90MB/s

Hi Musti
Where are you buying from? What Country do you reside in?

its not worth to buy the Pro Plus, i've the normal Pro and speeds are 65MB Read and 35MB write. The Card isnt nearly exhausted .... A sandisk ultra card does the same job for a lower price.
I think the sd card controller is responsible for this "lower" speed....

The EVO+/EVO Select are more than enough, especially for a fraction of the price
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