Instruct: Classify Amazon reviews into positive or negative sentiment
Query: POS

Worked good -- actually got one complete backup onto it. Didn't use it for 3 months. Then wanted to update the backup. Found the FireWire port no longer worked. Used the USB instead to do another backup.... noticed that 1 hour later it was backing up the same file. Found that the harddisk had powered down. POS. Also received several Write Delay errors. Summary: POS