HP 762749-001 800GB is an SSD type hard drive which can fit 800 GB of data. The form factor is 2.5".
From SmartTeck
HPE 762749-001 internal solid state drive 2.5" 800 GB SAS -
Clove Technology
HPE 762749-001 internal solid state drive 2.5" 800 GB SAS
Compadvance
HP Ssd 800Gb