The Aspire SW5-012 has an HDD storage medium which is better than the SSD storage medium found on most comparable spec laptops that were released around the same time as 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.
This portable PC's storage medium (HDD) is actually the worst storage medium amongst all laptops of this spec and age.
The best storage medium across comparable types of portable PC is SSD.