Danger! Beware of 4 terabyte portable hard drives - Photofocus
Amazon.com: Western Digital Purple 4TB Surveillance Hard Disk Drive - 5400 RPM Class SATA 6 Gb/s 64MB Cache 3.5 Inch - Western Digital40PURZ [Old Version] : Electronics
WD 4TB My Book Desktop External Hard Drive - USB 3.0 - WDBBGB0040HBK-NESN - Walmart.com
WD Purple 4TB HDD - MEGATEH.eu Online shopping EU
Seagate Backup Plus 4TB Portable Hard Drive Review - MacRumors
Toshiba adds new 4TB CANVIO Portable Hard Drive models for safe and reliable personal data storage - EMEA Region – Toshiba Storage Solutions
Nike Zoom Freak 4 TB Black White - DO9679-002 - US
Seagate Backup Plus Portable 4TB External USB 3.0 Hard Drive - Black - Walmart.com
Seagate IronWolf 4TB NAS Internal Hard Drive HDD – CMR 3.5 Inch SATA 6Gb/s 5900 RPM