[HD2 Android Q&A, Help & Troubleshooting and Genera] thierry_hd2:
Some facts and figures

Sometime ago, I promised to come back with some results. Here they are :)

Depending on how you are looking at it, it is good news or bad news. For the one that don't like to read all the stuff, here is the summary:

- there are HUGE differences in performance between SD cards

- a class 10 SD card is not enough to get the speed for Nativesd or DATAONEXT

- the most important performance aspect is the 4K read and write speed.

- the more applications you are running at the same time, the more chance you'll have lag issue

So, find a card with the highest 4K read/write speed.

For the one that need more insight and more information read further.

I tested three different SD card:

- Transcend Class 6

- Samsung Class 10

- Sandisk Ultra 16GB (They delivered the "Ultra" version but not the "Ultra mobile"!)

Results:

- The biggest disappointment was the Samsung Card. It's 4K read/write performance is worse than the Transcend Class 6 card. In real life situation, it was a real pain to use for my Nativesd roms. It was unusable :( I think it's a fantastic card in a camera because the sequencial write speed is really quick or if you need a good card to transfer your mp3 or video files.

So the card is bad for Native SD but good for storage.

- The Sandisk Ultra gave me mixed feelings. After installation, the ROM was flying. Going from the home screen to the parameters: what a breeze. After installing some applications and some widgets (less than 30) like maps, be weather pro, google now, battery monitor, the phone tended to lag again. Less than with the other SDcards but still lagging :( The phone would need between 5-10 seconds to start Google Maps. Google now would also need between 5-10 seconds to start. This was a dealbreaker for me.

I wanted/needed it to work so I tried two different configuration:

- CM9ight leo v1.1b on NAND. The problem is that you haven't enough place if you like to install lots of apps. But the partition size is really small: 115MB.

- Nexus HD2 Jellybean CM10 v1.3a on NativeSD

The only tweak I am using is Force GPU render.

The performance between both is about the same. Which is really goog for a JB rom compared to the ICS rom!

For the NativeSD, I didn't install my regular widgets like battery pro and be weather pro. I did so in order to avoid apps running in the background and needing to access the SD card.

For three weeks I ran both configuration. In the end, I ended using the JB rom on NativeSD:

- performance was similar

- I prefer the JB interface and look & feel

- I can use Google now with a good responsiveness on the JB Rom

- maps is also very responsive

- bluetooth (in car) is working good

What would be my recommandations:

- if you like widgets and need lots of applications go for NAND. The CM9ight (ICS) is really good and only need a 115MB partition size. It leaves "some" room for apps. You can even try apps to transfer apps to the SD card. There are some good one on XDA.

- if you need a daily rom with JB without the need of extra widgets you can go for NativeSD. This is my prefered configuration.

For NativeSD:

- limit the applications running in the background (widgets, ...)

- reboot the phone every other day

- use multitasking to "close" applications

I didn't try DATAONEXT. I will never try because in the meantime I have bought a new phone.

I hope this will give you some help in order to decide what you prefer. It would be good if someone running on DATAONEXT could give us some thoughts about his/her configuration.

Happy new year,

Thierry