The Transformer Book Flip TP300LA has an HDD storage medium which is better than the SSD storage medium found on most comparable spec laptops that have been on the market for 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 laptop's storage medium (HDD) is actually the worst storage medium amongst all laptops of this type and age.
The best storage medium across similar types of laptop is SSD.
If the storage medium of this 2 in 1 laptop is not good enough for you then you might also want to consider the HP 13-r100dx (£1,054.30) (Hybrid-HDD).