This 4GB SD card that is OEM branded gives you about 31,745 blocks to store E-Shop purchased games etc. I definitely plan on buying some games to store in this thing. The most you get with the Wii internal memory is like 2,000 blocks just to give you an idea of how convenient it would be to buy one of these memory cards. Always go OEM to make sure it works, I bought a different brand one that was 2 gigs for just a couple bucks and it didn't work on the Wii but it worked on the DSi XL I have which was weird but at least I didn't lose out on that money. There were a few memory saves that I wasn't able to transfer over to the sd card like: Mario kart Wii, Super Smash Bros Brawl, Dragon Ball Z budokai and 2 other titles but everything else like my e shop N64 games I bought like paper Mario and yoshi story and even Sonic the Hedgehog 2 I was able to transfer over with no issues.