My trust WD MYCLOUD EX2 Ultra NAS.  Upgraded as needed more storage, so this is now surplus to requirement.  This unit is configured as follows:
This unit has been really reliable - the best thing about it is you don't notice it - plug & play.

In addition to serving network storage via NFS, SMB/CIFS and iSCSI - it also runs a number of services including PLEX, Goodsync and Docker.  For a long time I had this as my PLEX Media Server and personal cloud storage (alternative to Dropbox, etc).

I have performed a full factory reset and it is running the latest software - so ready for its next owner.

I've taken a number of photos and screenshots so you can appreciate it's condition.

Here's the stock blurb:
  • High-performance 1.3 GHz dual-core processor for streaming
  • 1GB of DDR3 memory to multitask with ease
  • Centralized network storage and access from anywhere
  • Automatic file synching across all your computers
  • Simplified file and folder sharing
  • Personalised backup and multiple RAID options
  • 1 x Gigabit Ethernet RJ45 port
  • 2 x USBV 3.0 ports
  • Numerous options – Choose the diskless enclosure to build your NAS with the drives of your choice. Or, choose a populated system that works right out of the box, featuring WD Red™ hard drives for ultimate reliability in the unique 24x7 NAS operating environment.
  • Drive management – Control your data with multiple drive management options including RAID 0, 1; JBOD, and spanning modes.
  • Data protection at its best – You’re armed with multiple options to secure your data from loss. Choose from RAID 1, USB, cloud or LAN/WAN backup depending upon your data security needs.
  • Easy to manage – A powerful dashboard means your system is always under your control. Monitor your drives, manage users and utilize energy-saving features. Email and mobile alerts keep you informed of My Cloud EX2 Ultra status.
  • Powerful apps to customize your NAS – Including aMule, Icecast, Joomla!®, phpBB®, hpMyAdmin, Transmission, SqueezeCenter, and more..
  • Advanced serving options – Integrated file server, FTP server, backup server, and P2P torrent download server.
  • Stream media to your connected devices – Stream videos and photos to connected TVs, media players, gaming consoles and other DLNA®/UPnP® devices. Features a Twonky and a DLNA-certified media server. And with a built-in iTunes® server, you can easily stream your music collection.
  • Back up, your way – Protect your data via remote backup to another My Cloud device, integrated cloud backup or local LAN/WAN backup. PC users, WD SmartWare™ Pro offers options for how, when and where you back up your files for up to ten computers. Mac® users, utilize all the features of Apple® Time Machine® backup software to protect your data.
  • Expand your capacity – Simply attach a compatible USB hard drive directly to My Cloud EX2 Ultra to expand your storage capacity. Two USB 3.0 expansion ports are provided.
  • Integrated energy-saving features – Save energy with disk spin-down and scheduled power on/off.
  • Your own Private Cloud – Unlike public clouds, My Cloud EX2 Ultra allows you to keep all your content in one safe place on your home or office network instead of a remote server.  No monthly fees. No limits.
  • Advanced features – iSCSI target, full-featured FTP services, jumbo frame support, iPv6 ready, UPS support (USB and network), real time resource monitor, volume encryption with boot-up password, SNMP and virtual volumes.