Those of you who tried using their 64GB MicroSD cards on BlackBerry 10 before the latest OS may have noticed that you had to reformat it to Fat32 which is in no way ideal. This even caused some serious instability issues with the first batches of 64GB cards. Now BlackBerry has finally added exFAT support in OS 10.2.1 though it works in an odd way. When you plug in an exFAT supported card it will prompt you to download drivers. Either way this will allow you to have file sizes over 4GB and up to 2TB. Personally I am just glad to not have to reformat cards because the instability was bad on Sandisk cards.