Been having issues with my 16gb stock card and had been rooted via the app on the market. I basically, was starting to lose data. I don't know if it was cause I didn't unmount the card or not from my PC when finished working it but lost quite a bit of stuff. I also removed root to see if my stability returns. Just picked up a 32 gig card online and have seen prices on Google Shopping for as low as 50 bucks (free shipping and handling). I got stuck purchasing the one I did, from Ebay. So ended up spending 80 (which I had thought at that moment was a pretty good price).