Hey guys I am always using seagate expansion portable HDD this is very useful for me and easy to carry this hdd. high speed data transfer and I am using this hdd for backup my pc data and fell self for data lose, I am always suggest my friends t buy this Portable HDD and 2 year of warranty and secure my data from seagate lock software, and easy to diagnostic my HDD from Seaget diagnostic tools, and check online warranty from seaget website this is very useful for me .