We had an issue with our hard drive and they corrected it and sent us a new one.

I did a lot of research prior to buying and this is the best deal for an nvr/8ch system with 4 cameras and 1 Terra bite hard drive.

For 110 bucks and 40 bucks for a t2 hard drive 150 for this combo is the way to go verse spending 300-400 on other brands

Then I got to the point of formatting the hard drive.

Without fully troubleshooting the problem with me, they sent me a new hard drive but it didn't work with the system

Love that it comes with built in hard drive

Love the included hard drive for replay

Second, it does not come with a hard drive, so you cannot play back video without purchasing a separate hard drive.

After I did purchase a hard drive the system did not recognize it, leaving the system useless

This uses a hard drive, and also allows you to record to the phone, send email notifications, as well as app alerts.

When mine arrived the connection to the hard drive was disconnected so I called tech support

Working with Fiona researching through many e-mails and phone calls it was determined the hard drive was bad.

The hard drive struggles to keep up with the cameras and the distance you can place the cameras is not very far

System has a 1 TB hard drive which is great

Love the included hard drive for replay

Update 4-28-17 Found my issue was that I cannot have it set up for motion recording, NVR for some reason will randomly power cycle, you can have to have it record 24x7 which fills the hard drive fast and makes it difficult to search for video

You either let them overwrite each other or format the entire hard drive

I very easy set up , great email support, for questions.