Apple this afternoon released a flash storage firmware 1.1 update for mid-2012 MacBook Air models which addresses an issue related to a small number of faulty flash drives that may result in data loss. If your drive cannot install this update, Apple will replace your flash storage for free.
This firmware update is recommended for MacBook Air (mid 2012) models.
Apple has discovered that a small percentage of flash storage drives in these MacBook Air models have an issue that may result in data loss. This update tests your drive and, in the majority of cases, installs new firmware to resolve the issue. If your drive cannot be updated, Apple will replace it, free of charge
Click here to download the update–it’s 2.21 MB in size.