I just bought a Micro SDHC (32GB  ADATA) so I turned off my phone (Galaxy Grand), took my old MicroSD (8GB dont remember which brand) and put the new one. My old MSD started working fine as soon as I put on the phone so I though it was going to be the same with the new one. So I connected the phone to my PC and tried to transfer some files but it didnt worked, neither I could create folders, so I tried formatting the MSD from my phone and it quickly send an error message "The memory is damaged" (or something like that because my phone isn't on english). So I took the MSD, connected it to my PC (with an USB adapter) and formatted it, put it on the phone again, connected the phone to the PC and tried again to transfer some files but it didn't worked. After several tries I tried to transfer some files connecting the MSD (formatted from my PC) through the USB adapter and it worked, even transfer song and when I put the MSD on the phone I could listen to the files.

So the problem is that I cannot transfer files to the MSD when it connected throught the phone but I can when it's connected through the USB adapter.
And as far as I remember neither I can "create" files from my phone to the MSD (create folder, take photos, and probably install APPs).

I read a lot of people having similar problems but most of them didn't had a working answer (at least for me) and weren't so detailed as Im trying to be.

Really hope you guys can help me !