Given an Amazon review, indicate whether it is a 'Positive Review' or 'Negative Review'.
Q: Bought this brand new Sandisk ultra micro card. After a little more than 1 month of use with my Samsung Galaxy S3, it suddenly became inaccessible. Didn't leave me a chance to backup. Tried in phones and computers and could not get even see the drive.<br /><br />The customer support first admit it was a production issue which affects a percentage of users. Later on they denied that was production issue.<br /><br />Well, lesson learned, backup my data frequently and don't trust the business that may seem very trust worthy.
A:
Negative Review