Definition: Given an Amazon customer review, write a title for the review. The preferred titles are under fifteen words.
Input: After installing then original card in my Galaxy S3, the card would unmount and mount again and again through out the day.  This created horrible battery life.  Then within a week all the data on the card became corrupted.  I formatted it in FAT32 hoping this would solve the problem only to have the same thing happen again.  Then I tried once more with exFat, only to get the same data corruption.  I contacted Sandisk and they replaced the card.<br /><br />Card #2 did the same thing within two weeks.  I decided I might use the card in my SLR since it was a no go in my phone.  However, it was slower than the three other class 10 cards I owned and the two other class 6 cards I own.  I tested them with both a Windows program, a Mac program, and in the SLR itself.  My slowest class 6 card from Transcend would take 18 pictures in burst mode before slowing down.  Sandisk's \\"Ultra\\" card would only take 14.<br /><br />This problem is well known, just look at the reviews here or Google the card.  So when I talked to Sandisk, I asked that they replace the card with of equal value from one of their different line of cards.  I talked with a representative at length and she escalated the next level of support to see if this alternative was possible.  I was assured that the same representative would contact me shortly by phone so I would not have to go through the whole process of explaining things again from the beginning.  Seven hours later I got a call from a different representative who knew nothing of the problem, requiring me to explain everything from the beginning. He said all Sandisk could do was send another of the same card.  He assured me that the problem with the card had been fixed and that Sandisk's products were reliable.  Funny, the representative told me the exact same thing a month ago when they shipped me card #2.  I have 9 other SD cards (two of the micro SDXC variety) and none of them have had any problems.  Yet, the two Sandisk cards of this variety have both failed.  Please, please buy a different card so you can avoid my experience!

Horrible, do not buy!!!