Synology NAS DS423 network storage, for 4 drives

Synology DiskStation DS423
4-bay NAS for home/small business use
Operating system: Synology DSM (DiskStation Manager) – a powerful, intuitive NAS platform with many applications for files, photos, archives, and videos, and so on.

CPU Realtek RTD1619B – 64-bit ARM processor with 4 cores, up to ~1.7 GHz

RAM 2GB DDR4

Drives 4 × SATA HDD/SSD

RAID Yes (DSM/SHR)

LAN port 2 × 1 GbE (Link Aggregation)

USB port 2 × USB 3.2 Gen 1

Cooling 2 × 80 mm fans

Security and features

Synology DSM offers extensive security and networking features:

Snapshot Replication – point-in-time snapshots for quick recovery in case of accidental deletion/malicious changes.

Backup solutions: backups of computers, phones, cloud, etc.

Surveillance Station: support for up to 30 IP cameras via VMS platform.

VPN Server/Client, Firewall, 2FA, security policies, HTTPS access, etc. (built into DSM)

Synology DSM makes the DS423 much more than just a regular NAS:

Centralized file storage and sharing
Access files from mobile/desktop devices
Automatic backups and synchronizations
Multimedia services (Photos, Video Station, Audio Station)
Surveillance Station for video surveillance
User/rights and shared folder management
Hybrid cloud storage (Synology Hybrid Share)