NAS 4.0 Adapter

Share as many as 16 hard drives over the LAN As large as one exbibyte per drive volume
75MB/sec transfer speed over 1G network Enterprise NAS at a fraction of the cost

The NAS 4.0 is Addonics' 4th generation NAS adapter with several major enhancements. Comes with two eSATAp ports that allows attaching either two eSATA or two USB 2.0 storage devices onto the LAN, as many as 16 storages devices (or drive volume) can be attached to the new NAS 4.0 using USB hubs. With these many drives, you can easily share multi-Terabyte storage over LAN or build your own private cloud storage that can be accessed via the built-in FTP server.

Performance of the NAS 4.0 is quadrupled from the previous NAS adapter to 75 MB/sec over 1G network.Both the maximum number of SMB and FTP accounts as well as the concurrent users supported by the NAS 4.0 are vastly expanded to support over thousands and hundreds respectively.

The NAS 4.0 also support storage devices with multiple partitions, with each partition appearing as a share folder on the network. The supported file system now includes XFS, EXT2, EXT3, EXT4. NTFS and FAT32. A very large storage in excess of hundreds or thousands of Terabytes storage capacity can be easily built by attaching multiple units of Addonics RAID Towers or RAID Racks. A storage farm with capacity exceeding many commercial data center can be easily put together at just a fraction of the cost of an enterprise storage system. Storage capacity can be added to the NAS 4.0 in many many years to come without ever reaching the capacity limitation.

The NAS 4.0 has also added new powerful features beginning 6/16/2014 via a new firmware release. There are now full disk sharing and existing folder sharing from drives created by other systems. Shares can be applied to both FTP and SMB for different users and with different READ/WRITE privileges. These new features allows quick set up of sharing information on existing drives through LAN and WAN, making it an ideal tool for setting up a private Cloud storage. It is also a great tool for sharing information on existing drive on a private network such as at home or a temporary LAN without any elaborate administrative set up.

Constructed in a rugged metallic housing in the size of a cigarette pack, the NAS 4.0 adapter is built to last and can be deployed in home, general office, factory or mobile environment.

Front View of NAS 4.0 Adapter
Rear View of NAS 4.0 Adapter


Illustration of a NAS 4.0 Adapter connected to the LAN and WAN


Family of NAS adapter comparison


Model #

Price $ $ $
supported network speed (Mbits/sec) 10/100 10/100/1000


Supported File system FAT32 FAT32/64, NTFS


Max. transfer rate ~ 8 MB/sec R/W FAT64:
~ 18 /12 MB/sec R/W

XFS: ~ 80 / 50 MB/sec R/W

MAx. # of HDD / Flash drives supported 1 2 (one is shareable READ only)

16 by using USB hub or Port Multiplier via USB connection

Max. # of partitions per drive 1 1


Storage interface USB 2.0

• One USB 2.0 for storage
• One USB 2.0 for printer or storage with READ only support

Two eSATAp ports that can be used for eSATA or USB 2.0 connection

Maximum partition size or drive volume 2 TB

FAT64: 128 PB

XFS: 16 TiB
EXT4: 1 EiB
FAT32: 2TB

Min. drive volume 1 GB

1 GB

64 MB

Max. file size 127GB

FAT64: 16 EB

XFS: 16 TiB - 1 byte

USB hub support NA



SMB server Yes



FTP server Yes



WebDAV server NA



Print Server Yes Yes NA
Media server Yes Yes NA
Bit-Torrent client Yes Yes NA
ML-Donkey client NA NA Yes
Max. # of SMB accounts 16 16 64,000
Max. simultaneous SMB connections 64 64 32,000 SMB and FTP combined
Max. # of FTP accounts 32 NA 64,000
Max. simultaneous FTP connections 64 NA 32,000 SMB and FTP combined
Max. # of webDAV accounts NA 16 NA
Max. simulaneous WebDAV connections NA no more than 4 for best performance NA
Size (L x W x H) (70 x 32 x 24) mm or (2.75 x 1.25 x .94) in. (85 x 55 x 23) mm or (3.35 x 2.17 x .91) in. (85 x 55 x 23) mm or (3.35 x 2.17 x .91) in.
Weight 45g (1.6 Oz) ~ 78g (2.75 Oz) ~ 172g (6.1 Oz)
Enclosure material plastic plastic heavy duty sheet metal

  • Turn any eSATA or USB mass storage device into a Network Attached Storage appliance
  • Great for setting up a private Cloud storage or quick drive sharing (these new feature requires the latest firmware V98a.5 released on 6/16/2014)
    • Support full disk sharing of drive with existing data in SMB and FTP
    • Support selecting existing folders² that are already on the drive for sharing in SMB and FTP
    • Full Disk or Folder sharing can be assigned to authorized users with different READ/WRITE privileges
  • Great for attaching Addonics Raid Tower / RAID Rack, Flash reader and any Addonics USB storage device onto the network
  • A powerful tool for creating a custom Network Attached Storage appliance.
  • Two eSATAp ports for connecting two eSATA storage devices for high performance or two USB 2.0 storage devices
  • Up to 16 storage devices can be connected to the LAN with the following additional accessories:
  • Support Up to 15 partitions per storage device - giving a maximum 240 drive volumes on the network
  • Built-In SMB / Samba server for file sharing over LAN
  • Built-in FTP server for file access over the internet
  • Support any eSATA or USB storage with XFS, EXT2, EXT3, EXT4, NTFS or FAT32 file system
  • Maximum partition size or drive volume capacity:
  • Storage device with existing data can be attached to the NAS adapter (the folder name must be in large CAP to be sharable). See Q&A section on folder and file security setting.
  • Built-in file formatting utility for XFS and EXT3
  • Support 10/100/1000 Mbps network
  • Maximum data transfer over Gigabit LAN:

      eSATA storage USB storage
    read write read write
    XFS up to 85 MB/sec up to 45 MB/sec up to 30 MB/sec up to 30 MB/sec
    EXT3 or EXT4 up to 50 MB/sec up to 35 MB/sec up to 30 MB/sec Up to 30 MB/sec
    NTFS up to 16 MB/sec up to 5 MB/sec up to 16 MB/sec up to 5 MB/sec
    FAT32 up to 18 MB/sec up to 8 MB/sec up to 18 MB/sec up to 8 MB/sec

  • Built-in MLDonkey client for direct download to the attached storage device
  • Web GUI administration
  • User management to allow read only or read/write access to folders
  • USB port can be used to power most 2.5" USB hard drives or any low power USB storage device
  • Simple to install
  • Small and light weight. Size of a cigarette pack. Can be installed practically anywhere
  • Rugged metal enclosure for use in wide range of application environments
  • Compatible with all Windows OS, Mac OS X, Linux 2.6.x and above

*USB hard drives over 2TB from Western Digital and Seagate such as the GoFlex series are not compatible, please see detail explanation in Q&A section


1. These new features are available on the latest firmware V98a.5. Products that are shipped after 6/15/2014 are loaded with the latest firmware. You may upgrade to the new firmware on your unit by going to the Support tab on this page and follow the firmware upgrade procedure.

2. Only folder name containing no space can be shared

Application note:

When a hard drive is attached to this NAS adapter, a unique mount point is created in the NAS adapter to track this drive. This mount point is associated with the volume serial number (VSN) of the drive. The VSN is a unique # created by the OS when the drive is formatted. The SHARE configuration for each drive follows the mount point of the drive. So in situation where you want to switch out to a different hard drive and use the same share set up, the new hard drive must have the same mount point or VSN as the hard drive being replaced. You may use RAID 1 to duplicate the VSN on both drives or you may use this free software utility to change the VSN on the drive.

Please note that you cannot mount two or more drives with the same VSN to the NAS adapter, doing so may cause the NAS adapter to crash, unpredictable data loss or other problems. DO NOT use two drives from a mirror set or a clone set as these drives most likely have the same VSN. If you see drives with duplicate mount points under the VIEW DRIVE INFORMATION screen or during the SHARE set up, you should remove one of the drives with the same mount point ASAP.

  • Two eSATAp (eSATA/ USB 2.0 combo) connectors
  • SATA 1.0 specification
  • USB 2.0 / 1.1 specification
  • USB port can supply power up to 1.5A at 5V using the bundled power adapter
  • One RJ45 socket for 10/100/1000Mbps Ethernet connection
  • File systems support: XFS, EXT3, EXT4, NTFS, FAT16, FAT32
  • Maximum # of storage devices supported - 16 (requires combination of USB hubs or Port Multipliers)
  • Maximum # of partition per storage device - 15
  • Maximum user accounts:
    • Samba server - 64,0000*
  • Maximum # of concurrent connections:
    • Samba and FTP server combined - 32,000*
  • LED for power, status and LAN activity
  • Power consumption: 2 watts @ idle, 2.5 watts average during operation
  • Dimensions (L x W x H): ~ (85 x 55 x 23) mm or (3.35 x 2.17 x .91) in.
  • Weight: ~172g (6.1 Oz)
  • Operation Temperature: 0 °C ~ 70 °C
  • Operation Humidity: 10 ~ 90 %RH
  • Storage Temperature: -20 °C ~ 70 °C
  • Storage Humidity: 5~ 95 %RH
  • Power consumption: ~ 500mA @ 5V

* These are the theoretical limits in the kernel. As # of concurrent connections increase, performance starts to decline depending on the drive access activity from the concurrent connections.


NAS40ESU - (NAS 4.0 adapter)
Package content: NAS 4.0 unit, 5V 110/240V AC adapter, 6" CAT5e cable, User guide
Price: 89.00


AD4U3HEP (4-port USB 3.0 hub, with power adapter)

4-port external USB 3.0 hub with built-in 3 feet USB 3.0 cable, includes 110/240VAC  5V/2A power adapter, user guide.

Price: 25.00
AD5EHPMEU3 (External Port Multiplier Ultra)
Package content: External Port Multiplier Ultra main unit, 5V 110/230V power adapter (AAPAC5V), 24" USB power cable (AAUSBPCP24), user guide
Price: 69.00
RT134SDEU3 (RT XIII, 4 HPM-XU, 4 Snap-In DA)

RT134SDEU3    RAID Tower XIII  with four HPM-XU and four Snap-In Disk Array installed. Components list made up this model: Storage Tower XIII (ST13), four HPM-XU(AD5HPMREU), four Snap-In Disk Array (AESN5DA35). four 6-foot eSATA cables (AAESATA200C) and four 6-foot USB 3.0 cables (AAU3AB6F), power cord and user guide.

Price: 1099.00
RR2035RSDES (RR Snap-In Disk Array w/ redun PS, eSATA)
Storage Rack DA base unit with redundant power supply (SRDA460R), four Snap-In Disk Array (AESN5DA35), four 5X1 HPM-XA- System Version (AD5HPMSXA), one 4 eSATA ports bracket (AD4ESASB), four 6-foot eSATA cable (AAESATA200C).,
Price: 1699.00
NAS 4.0 Adapter
Applies to: NAS40ESU
NAS 4.0, Internal GigaNAS, NAS Tower and Secure NAS Firmware v98a.5
Applies to: NAS40ESU, SN535E1G, SN1035E1G, NT15SNES1G, NT5SNES1G, NAS4RM

New firmware v98a.5 for NAS 4 Family products.

NEW FEATURES: Share an entire drive or an existing folder.

BE SURE TO READ THE REASE NOTE below and FOLLOW the firmware update instructions

DO NOT download the firmware to your computer to do the update. You have to paste the link as instructed in the firmware update page. The NAS adapter must be attached to a LAN that has internet connection to do this update.

Disclaimer: As in any update, problem may appears during the update process that are beyond anyone's control. This may result in your equipment becoming inoperable. Addonics is not liable for any time lose, recovery of data or repairing of the NAS adapter that is out of warranty. 

NAS 4.0 Family Firmware Release Notes v98a.5
Applies to: NAS40ESU, NT5SNES1G, NT15SNES1G, SN535E1G, SN1035E1G, NAS4RM

Release Notes for NAS 4.0 family products.

NAS 4.0, NAS Tower and Secure NAS Firmware v88a
Applies to: NAS40ESU, , SN535E1G, SN1035E1G, NT15SNES1G, NT5SNES1G

New firmware v88a for NAS 4 Family products.

Correct file security issue between SMB and FTP. New files created in the SMB shared folder are now accessible from FTP  or vice versa


NAS 4.0 Family Firmware Release Notes v88a
Applies to: NAS40ESU, NT5SNES1G, NT15SNES1G, SN535E1G, SN1035E1G

Release Notes for NAS 4.0 family products.

NAS 4.0 Search utility
Applies to: NAS40ESU, SN535E1G, SN10355E1G, NT5SNES1G, NT15SNES1G

A Windows utility to search for the IP address of the NAS 4.0 adapter, Addonics NAS Tower and Addonics Secure NAS on LAN.