This hard drive from Transcend has room for 2 TB of data. This model has a 2.5" form factor, which apart from this model is commonly used in SSD drives.
From Amazon
Transcend 2 TB Rugged Portable Hard Drive - Shock Resistant USB 3.1 Gen 1 StoreJet Navy Blue - TS2TSJ25H3B
Clove Technology
Transcend StoreJet 25H3 2TB Blue
Conrad Electronic
Transcend StoreJet® 25H3B 2 TB 2.5 external hard drive USB 3.2 1st Gen (USB 3.0) Blue, Grey TS2TSJ25H3B
OnBuy
Transcend 2TB StoreJet 25H3 USB Type-A 3.0 (3.1 Gen 1) 2000GB Black,Blue external hard drive