Since it’s a Class 10 card, you can expect fast read write speed of up to 10 Mbps and support for all popular formats. Your apps running from SD card will also show very little lag. To know if your phone will support this 128 GB microSD card, you can simply go to official Sandisk Compatibility Widget, enter your smartphone brand name and check if your device is in the list. All major flagship phones will have SDXC card support, however, If your phone does not support 128 GB card and supports SDXC standard, the card won’t work for your device, and this narrows it down to only latest devices like Lumia 630, Samsung Galaxy S5, HTC One M8, etc. “SanDisk’s high-performance 128GB SanDisk Ultra microSDXC memory card will reshape the way users interact with their devices,” said Stuart Robinson, director, Handset Component Technologies, Strategy Analytics. “Until now, consumers had to spread out their content between multiple products because the memory on those devices was not able to hold enough data in one place. This 128GB microSD card is going to be popular as the preferred removable storage option, giving users fast, secure and reliable access to their personal data archives.” To further facilitate backing up your smartphone content on the vast storage space, Sandisk will introduce a new version of the SanDisk Memory Zone app on Google Playstore. The OptiMem feature of the app will let you transfer old content from your gallery directly to your MicroSD card. Moreover, this new feature will also monitor mobile device memory level s and inform users if it falls beyond a predefined threshold. Overall, the card will provide with 16 hours of Full HD video, 7,500 songs, 3,200 photos and more than 125 apps,all on a single removable card. Having 128 GB of secondary storage is a good option for those who don’t like to live on the cloud, but the compatibility issues kill most of the excitement. In about one year when more phones will support 128 GB of MicroSDXC cards, the card will definitely be much more appealing. The Sandisk Ultra microSDXC UHS-I memory card will be available for purchase for 9,999 INR starting from May 2014.