I guess my SDcard was a lemon.

[TammyCampbell]

I just bought a new memory card for my d5100 .. finally fast shutter speeds.. tch,tch,tch.. music to my ears. It was sluggish before and i had bought an ultra too. I guess it was a lemon.

 

[valvestem]

I have had lemon SD cards too. Lexar 4mg in a two pack, one good one bad. Now I stay with Sandisk brand.