OWCs Mercury Aura Pro Express SSD provides up to nearly 4X the capacity over the maximum available factory SSDs while offer up to 3x Faster Performance vs. Factory Options.More SPEED up to 507MB/s...3x faster than factory.*More STORAGE up to nearly 4X more capacity!**More OPTIONS choose from 120GB or 240GB models.More COMPLETE includes all the tools and free video necessary for installationThe Mercury Aura SSD line features industry leading SandForce DuraClass Technologies:DuraWrite extends the endurance of your Solid State Drive (SSD).Intelligent Block Management & Wear Leveling automatically distributes data evenly across the entire SSD.Intelligent Read Disturb Management spreads the active read/write across the flash components eliminating data corruption caused by constant use.Intelligent Recycling for advanced free space management gradually re-writes data across the SSD over time to ensure data never gets corrupted.RAISE (Redundant Array of Independent Silicon Elements) protects the data on your drive similar to having a RAID setup.Best-in-Class ECC Protection for longest data retention and drive life.Once again, OWC provides Mac users an upgrade path that delivers higher performance, functionality, and reliability! Whether you own or are considering a 2011 base model 11″ MacBook Air with a 64GB Solid State Drive or the top of the line 13″ model with a 256GB SSD, OWC's Mercury Aura Pro Express 6G SSD offers 3x higher speed than the factory SSD.... up to 507MB/s and up to 4X more storage capacity than factory options.More OptionsUnlike the factory pre-configured models with no other SSD choices offered, the OWC Mercury Aura Pro Express 6G gives you the freedom to choose from a variety of sizes to meet your storage needs. Better by Design Mean Time To Failure - We all know that nothing lasts forever. But that doesn't mean you shouldn't get the most out of your investment. OWC SSD with Durawrite Technology, optimizes writes to the flash memory over