Just be carefull, I have heard complaints on the ebay forums recently that there are a few dhgate sellers that are selling So called 2 and 4 gig chips that dont have the storage they claim.
some seller claim their memory card has 4GB capacity while actual capacity is 2GB.
there is a program installed in the card which has the same function as winrar.
so you could put 4GB files in the 2GB memory card.
but that would be a dangerous to your file.it is quite probable to destroy your files.
hope that help