Can't change Micro SD

Hi, I'm using original R4 Flashcart and Kingston 2 GB Micro SD, they're working fine. Then I decided to upgrade to Kingston 4 GB Micro SD.
Basically just copy the whole file into the new one right? Ehrr, it didn't work out. When I tried it, the screen just stuck in "Loading"
I even tried to format the new Micro SD and still like that.
Any help?

It is R4 Original right?
Well if it is it can't read SDHC Micro SD's
Anything bigger than 2GB Micro SD is a Micro SDHC

It cannot open anything more then 2 GB.So...get 2x 2 GB! It's 4 GB too.

Like stated above, the original R4 only supports up to 2GB. The R4DS SDHC can support your 4GB card.

Replying to #4

But R4 SDHC is a R4 Clone and won't be able to run Wood Firmware

Ah, now I know why. Thanks!
So 2x 2 GB means two Micro SD?

Replying to #6

Yep.