Network Attached Storage backup server

This is a QNAP TS-412 NAS, used for networked backup in a home or small office. It holds up to 4 drives (3.5 or 2.5) and has two network interfaces. It has 4 usb ports and two eSATA ports. In good working condition and running the latest software. No drives. Specs and info here: https://www.qnap.com/en/product/ts-412 There are apps for media server, surveillance, and cloud storage. The manufacturer says it supports 6TB drives.