Just received this today. Removed it from the packaging and inserted it into my Samsung Galaxy S3 (Verizon) and powered the unit back up and the storage was available. No formatting required. Worked the first time out. Settings showed 29.71GB of total space (32GB version) and 29.71GB of free space. I like the fact that a SD adapter came with it. Should I ever need to insert the card into my laptop it will come in handy. (yes I can plug my phone directly to my laptop but if I ever swap this 32GB card out of my phone and replace it with a 64GB version, I can use this 32GB version via the adapter for other purposes.)