Just to be on the safe side I would get another new high quality SD card. Buy it from a known good retailer. Amazon is not a known good retailer for memory cards or sticks. Amazon itself is good but you never know unless you read everything very carefully where the stuff comes from.
EB
EOS 1D, EOS 1D MK IIn, EOS 1D MK III, EOS 1Ds MK III, EOS 1D MK IV and EOS 1DX and many lenses.
