Got an 8GIG MicroSD card, and...
My Hero came with a 2GIG card ( I'm not sure what class ) - it was fine but too small.
After a bit of research, I found that the higher the class the faster the card ( ie class 6 is a faster card than class 2 etc ).
I formatted the new card in the phone.
So I copied all my old card files to my computer, then copied them over to the new card.
Put in the new 8GIG card in my phone and it mounted no problem and I had all my music and photos.
As I can see, it seems to be a lot slower than my old card. If I go to my photo album, it will load as a preveiw grid. This used to happen pretty quickly, but on the new card, the grid squares are grey, and then start to load up with the photo images.
Any ideas why and ways to fix this?