This is a mechanical HDD drive with a 4 TB storage capacity. The form factor is 2.5" which apart from this model is commonly used in SSD drives.
From Amazon
Transcend 4 TB USB Type-C Rugged Portable Hard Drive - Shock Resistant USB 3.1 Gen 1 StoreJet TS4TSJ25M3C
This product is also available at 1 unverified merchant.