This is an SSD drive with a 512 GB storage capacity. The form factor is 1.8".
From Amazon
Intenso Premium 512GB USB 3.0 External SSD with Aluminium Enclosure - High-Speed, Portable, Durable, and Secure Solid State Drive for Data Backup, Gaming, Media Storage, and Creative Professionals
This product is also available at 2 unverified stores.