With 1 TB of storage, this is a good hard drive if you need a larger storage unit. This model has a 2.5" form factor, which apart from this model is commonly used in SSD drives.
From OnBuy
Seagate Backup Plus Ultra Touch STHH1000400 1 TB Portable Hard Drive -
Gadcet
Seagate Ultra Touch, 1TB, Portable External Hard Drive - White, New
BuyKingston
Seagate Backup Plus Ultra Touch external hard drive 1000 GB White