This is a Synology DS420+. I purchased it around May 2020 and used it for about three years. It was working perfectly, but I haven't used it for a while because I upgraded, so I'm putting it up for sale. Operation has been confirmed. It's basically in good condition, and I've cleaned it, but some dust remains inside the rear fan. Please be aware of this. The following accessories are included: AC power adapter x 1 AC power cord x 1 RJ-45 LAN cable x 2 (unused) HDD lock key Beginner's guide (slightly dirty) *HDD is not included When shipping, I will double-box it, using a Synology cardboard box (from a different product) over the product's original box.