This is a single drive NAS (Network Attached Storage) unit. It is fitted with a 750G Seagate Barracuda ES ( Enterprise Series) disk drive (ST3750640NS) for reliable 24/7 fault free service. The unit is in 'as new' condition. Both the NAS and the drive were purchased in the UK and have given fault free service ever since. That's why I've now bought a 4 disk QNAP NAS unit with Seagete ES drives! I have re-formated the drive and completed an error free 'bad block' scan ready for sale. I have also installed the latest firmware from QNAP. I am happy to demonstrate full funtionality before purchase. Interested? Then give me a call on 0890946591.