Seagate Backup Plus Fast 4TB Portable HDD US$135.92 (~AU$180) / Qnap TS-251A 2-bay NAS US$269.88 (~AU$360) Delivered @ Amazon

Seagate Backup Plus Fast is on Amazon's deal of the day at the moment.

$129.99 + $5.93 USD delivered to ParcelPoint
$129.99 + $6.93 USD delivered to home

Features

• Plug-and-play NTFS driver for Mac
• USB 3.0 with data transfer speeds up to 220MB/s
• Quick file transfer with USB 3.0 connectivity
• USB powered -no power supply necessary
• Compatible with PlayStation 4 (Requires PS4 System Software Update 4.50 or higher)
• Works interchangeably on PC and Mac computers—without needing to reformat

Please note that this is the FAST version which consists of 2 drives inside.

Cheapest price on staticICE is $299 pickup.

Qnap TS-251A 2-bay TS-251A personal cloud NAS/DAS with USB direct access, HDMI local display (TS-251A-2G-US)

$249 + $20.88 USD delivered to ParcelPoint
$249 + $21.88 USD delivered to home

Features

• Intel Celeron N3060 Dual Core 1.6GHz (up to 2.48GHz), 2GB DDR3L RAM (max 8GB), 2 x GbE LAN, USB Quick Access, hardware transcoding, encryption engine, max 1 UX-800P/UX-500P expansion unit
• Excellent system performance, ideal for centralized management, file sharing and backup ; USB Quick Access port for accessing files without needing a network connection
• Supports 4K hardware decoding and transcodes 4K H.264 videos on-the-fly or offline ; Enjoy the best audio-visual experience with HDMI output, multi-channel surround sound and the free remote control
• Build a personal karaoke system with Ocean KTV ; Linux Station supports Ubuntu® with direct output via HDMI
• A hybrid approach to virtualization: Virtualization Station & Container Station ; Supports Virtual JBOD (VJBOD) to maximize the storage utilization of multiple QNAP NAS units
• material used is plastic

Cheapest price on staticICE is $406.89 pickup.