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 Military Green - TS2TSJ25M3G
Clove Technology
Transcend StoreJet 25M3G 2TB
Conrad Electronic
Transcend StoreJet® 25M3G 2 TB 2.5 external hard drive USB 3.2 Gen 2 (USB 3.1) Army green TS2TSJ25M3G