Home Security System

This is my personal Home Security Camera setup.

Costs

Item	Average cost
Synology NAS	€ 175 - € 2000
(PoE) Switch	€ 40 - € 250 per unit
(PoE) Camera	€ 50 - € 5000 per unit
HDD/SSD Storage	€ 30 - € 350 per TB
UTP RJ45 Cables	€ 0,25 - € 1,25 per Meter

Footage Storage

For the camera footage storage I've gone for 2x 4 TB HDD's (for NAS usage). Only 4 TB out of 8 TB is usable, because I configured the disks in RAID-1 (mirroring).
So if one disk fails, the system will continue to record on the other disk and I keep all my saved footage.

Backups

There are a lot of different ways to do backuping, I've gone for a RAID-1 configuration on my NAS.
In a RAID-1 configuration a storage disk is mirrored to another one, so that in the event of a disk failure you can continue operation, plus everything that was saved is still there.
The downside to this configuration is that you will need to buy twice the amount of disks you want, and use more bays in your NAS.

In the event of a fire or sabotage for example, I have no backup. But you can keep your NAS synchronized to another NAS in another location if you want to buy and setup this level of backup.
You can also use cloud backup services that are being offered, or you can manually plug in an external disk and backup the NAS yourself every once in a while.

If you're willing to risk sudden capture stop and total data loss (which doesn't happen often, but can still happen), then you can skip this part.