The Apple MacBook Air Mid 2012 has an HDD storage media which is better than the SSD storage media found on most laptops that are a similar age to it. HDD is a traditional storage drive which stores the information on magnetic disks. HDD drives are slower than other forms of storage such as solid state drives (SSD) and flash drives.
An HDD storage media is actually the worst storage medium amongst all MacBooks that have been available for a comparable time to the MacBook Air Mid 2012.
Amongst similar types of notebook PC the best storage medium is SSD.
Alternative notebook PCs that have an HDD storage media currently available that you might also want to consider include because of it's better review score, the Apple Macbook Pro Late 2011[plb_1786902_price].