The Transformer Book T100TAM has an HDD storage medium which is better than most comparable spec notebook PCs that are a similar age to it. Most 2 in 1 laptops that have been on the market for around the same time as it have an SSD storage medium. 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 medium is actually the worst storage medium across all comparable spec notebook PCs that came out around the same time as the Transformer Book T100TAM.
An SSD storage medium is the best storage medium across similar types of portable PC.
If the storage medium of this portable PC is too bad for you then you might want to consider the HP 13-r100dx ($850.46) (Hybrid-HDD).