I am using this Seagate backup plus ultra slim HDD 1 TB since 2 year.this thing make me crazy due its storage in a very thin box.this is very slim and good in use.when I bought this its performance was awesome it reply me very faster but after two years its system start responding me slowly and slowly with the passage of time.its design is very awesome.it consist of 1 TB(1000 GB) in a slim fitting.the price of this product is very high which stop me to buy a new seagate backup plus ultra slim HDD 1 TB.so I will advice this product to those user who have enough money to bought this product easily