Jason J Chapman
I had bought this card for my new Samsung Galaxy S3. The card is about as good as you can expect for the price and technology you're paying for.SDXC cards come formatted in exFAT by default, which is what I would have tried to format it as anyway and seen if my phone supports that filesystem. In addition to being a faster format, enabling higher transfer rates, exFAT also takes up less storage space than, say, an FAT or FAT32 filesystem would - which is important when considering mobile storage devices.I read several poor reviews about this product starting that it simply stopped working after a few months. While that can happen from regular use, as it has happened to me in the past with a couple 32GB SDHCs, I would venture to say it was an error in use. Flash media is very sensitive in regards to "hard shutdowns". that's to say, just pulling it out of your device or card reader without first unmounting it. Within the 'Data Storage' menu on Android phones, there is an option to 'unmount SD card'. I would recommend that you ALWAYS select this before removing any external memory card to avoid corruption of data and, ultimately, the card itself. The reason for this is that sudden stoppage of a flash memory device's data or power connectivity can easily result in corruption.Transversely, if you have the memory card plugged into a card reader, say, with an SD adapter; you should first "Eject" the card. In Windows, there is a small icon located in the taskbar notification menu for "Safely Remov[ing] Hardware and Eject[ing] Media". Select the card and a notification will pop-up that the card is now safe to remove. It basically severs the same function as the Android 'unmount' optional but will also cease any current read/write operations to avoid data or device corruption.I cannot speak for how one would do this on a Mac OS but chances are, if you're using an Apple PC, you don't have an Android phone.