With 1 TB of storage, this is a good hard drive if you need a larger storage unit. The form factor is 2.5" which apart from this model is commonly used in SSD drives.
From Amazon
Verbatim STORE 'N' GO 1TB Portable Hard drive USB 3.2 - Slimline brushed aluminium
OnBuy
VERBATIM STORE´N´GO ALU SLIM 2.5" 6.35C