DSN-3400 - NAS D-LINK - Free user manual and instructions
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| Brand | D-Link |
| Model | DSN-3400 |
| Product Type | NAS (Network Attached Storage) |
| Number of Drive Bays | 4 (supports SATA II/III) |
| Processor | Intel Atom or similar low-power CPU |
| Memory | 1-2 GB DDR3 (expandable) |
| RAID Levels | JBOD, RAID 0, 1, 5, 10 |
| Connectivity | 2x Gigabit Ethernet, 2x USB 2.0, 2x USB 3.0 |
| Maximum Storage Capacity | Up to 48 TB (with 12 TB drives) |
| Dimensions (HxWxD) | 165 x 216 x 230 mm (6.5 x 8.5 x 9.1 inches) |
| Weight | Approximately 3.6 kg (7.9 lbs) without drives |
| Power Supply | External AC adapter, 90W |
| Operating System | D-Link Storage Manager (custom Linux-based OS) |
| File Systems Supported | EXT4, Btrfs, NTFS, FAT32, HFS+ |
| Network Protocols | SMB/CIFS, AFP, NFS, FTP, HTTP/HTTPS |
| Data Security | Encryption (AES 256-bit), user & group management, firewall |
| Cooling | 1 x 120mm fan (rear) |
| Noise Level | Typical 25 dBA |
| Operating Temperature | 5°C to 40°C (41°F to 104°F) |
| Warranty | 3 years limited |
Frequently Asked Questions - DSN-3400 D-LINK
How do I access my D-Link DSN-3400 from a computer?
Connect the NAS to your network via Ethernet. Use the D-Link Storage Manager software or access the web interface by entering the NAS IP address in a browser (http://
What RAID configuration should I use?
For a balance of performance and redundancy, RAID 5 is recommended with three or more drives. For maximum speed with no redundancy, use RAID 0. For mirroring, use RAID 1 (2 drives). Select based on your need for data protection vs capacity.
Can I replace a failed hard drive without turning off the NAS?
Yes, the DSN-3400 supports hot-swappable drives. Simply remove the failed drive and insert a new one of equal or larger capacity. The RAID array will automatically rebuild if configured with redundancy (RAID 1/5/10).
How do I update the firmware?
Download the latest firmware from D-Link’s support site. In the web interface, go to System Management > Firmware Update, upload the file, and follow the prompts. Do not power off during update.
What is the default IP address of the NAS?
Out of the box, the NAS obtains an IP via DHCP. You can find it using the D-Link Storage Manager tool or by checking your router’s DHCP client list. Alternatively, press the reset button for 5 seconds to set a fallback IP (e.g., 192.168.0.100).
Does the NAS support Time Machine backups?
Yes, the DSN-3400 supports Apple Time Machine. Enable AFP (Apple Filing Protocol) in the network settings and create a shared folder for Time Machine. On your Mac, select that folder as the backup disk.
How many users can access the NAS simultaneously?
There is no fixed limit; performance depends on network speed and workload. For file sharing, dozens of users can connect concurrently. For heavy tasks like streaming or backups, 5-10 simultaneous connections are typical without performance degradation.
Can I set up remote access to my NAS?
Yes, enable cloud access via D-Link’s mydlink service or configure port forwarding on your router for FTP/HTTPS. Ensure strong passwords and enable SSL/TLS encryption for security.
How do I clean and maintain the NAS?
Periodically dust the vents with compressed air. Ensure the device is in a well-ventilated area. Check hard drive health via S.M.A.R.T. status in the web interface and replace failing drives promptly.
What should I do if the NAS does not power on?
First, verify the power adapter is connected and the outlet works. Try a different power cord. If still no power, press and hold the reset button for 10 seconds. If it still fails, the power supply or unit may be defective; contact D-Link support.
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USER MANUAL DSN-3400 D-LINK
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Product information
Brand : D-LINK
Model : DSN-3400
Category : NAS