This card is neither reliable nor efficient.
Purchased 24.4 I thought to do a good deal for less than 1 GB. Unfortunately, I had to fall on a defective card or even against so-straight from Germany ... (Deutsche Qualität ???: - /)
My PC, the card does not reach the performance of a Class 4 basis of the same brand.
My Mobile Samsung Galaxy S + (GT-i9001) with Android 2.3.6 (XXKQI stock, even Cyanogen), it PLANT when writing large files: Backup or transfer GPS maps.
The card is HS for mobile. I must eject it, connect it to my PC and do a repair of the FAT32 partition, which recovers lost files and restores functional status for the mobile ... for a time.
In short, very disappointed.
Fortunately, the Amazon service is there. I will not have lost that time, no money. Back at the expense Amazon in the months of purchase and refund receipt. That's the rule!