Our trusty old Apple Time Capsule finally needed replacement - its WIFI just wasn't covering all corners of our house. We wanted a networked device to do the same storage function that the Time Capsule did over WIFI (using the Time Machine app on our Macs). After some research, I bought this WD NAS HD and one of those new mesh wireless router systems (this device is plugged into our new wireless router using an ethernet cable). The set-up went about 90% as planned. There was one confusing thing in the set-up I goofed up, but with one call to Western Digital tech support, I solved a minor set-up issue. Their tech support seemed Apple savvy and they knew exactly how to set their product up to work with Time Machine. It is now working just like the Time Capsule. We have several Macs in the house backing up to it. So this was a success!