Do you have a question mark folder? Too little storage space? We can help with that. MacBook Air models 2012-2017 come out with either a 128GB or 256 Apple SSD and can be replaced or upgraded with a standard (preferably Samsung) NVMe SSD of any storage size. To use the standard SSD an adapter is required for it to fit into the SSD slot on the board. We offer a fresh installation of  of your preferred MacOS and data transfer where possible .