Originally Posted by liranh
Okay that makes a lot of sense, thank you.
I've got a class 6 microSD card. Is that good enough for data2sd? And how do I go about doing it? Am I going to need to wipe and partition all over again, or is the current configuration I've got sufficient?
Yes, class 6 is good. I have it too. But use data2sd only if you need more space. If you don't, don't use it, your phone may lag, have less responsiveness, etc..
You can find MIUI-XJ in developer section that has data2sd implemented.
Also you can try other script like m2sd by dk_zero-cool and xa2sdx by amarullz.
I never use install them separatly, so read instructions in their trhead.
Maybe you have only to wipe dalvik and cache but I am not sure.