Is sometimes recognized, sometimes not

The 128GB card is in a Microsoft Surface Pro 3 for about 2 weeks in use. I have downloaded data from your desktop computer to the card. Before that, I was prompted to format the card, what have I done with NTFS format. Data transfer with adapter ran smoothly, but cozy.
In Surface Pro3 the card has been detected for the first commissioning immediately. Unfortunately, this does not always work. It may happen that even the card is not recognized when booting the Tablets. Even when reading from or writing to the card has already been switched off. Then only helps to remove it and connect it again and that is sometimes several times necessary.
These failures occur in about 20-30% of the usage. So far, I wanted the card does not delete and return cumbersome safe because of my effort is too large. If the failure rate is poor or annoys me more she goes back.

Addendum: I have the map now returned and recovered Amazon easily my money. The card was not recognized at least at 50% of the use or has passed over again in operation. That does not bother then already huge at work. The reading and writing rate was sufficient for me, because after the first cozy dubbing of large files only smaller files have been modified.