Update: The price has been bumped to $150, still a very solid deal and well below the average market price of $190.  For those who prefer Best Buy, they have price matched Amazon. 

Amazon has the Seagate Backup Plus 4 TB USB 3.0 Desktop External Hard Drive for only $140 with free shipping or free 2-Day for Prime members.  We recently featured this same drive at eBay for $150, although it was $130 from Staples for a weekend.  Newegg and Best Buy are both currently selling it for $190.  This massive drive features a USB 3.0 transfer rate, promising 30% faster transfer rates over most portable hard drives.  Almost 700 Amazon reviewers rate this drive 4 stars.

If you need an internal drive you can grab a 3TB. 7200rpm Seagate Barracuda for only $140, matching the lowest price ever. (via Deals Kinja)

Update: Back in stock for only $69 shipped, grab it on eBay via BuyDig.  Amazon is charging $79 and 1,400 unique reviewers give it 4 stars.

eBay via BuyDig is offering the Western Digital My Passport 1 TB USB 3.0 Portable Hard Drive for only $69 with free shipping. This drive ships brand new and includes a 2 year limited warranty. At max USB 3.0 speeds, the Western Digital Passport can push a 640 MBps (5 Gbps) transfer rate. As a pricing comparison, Amazon is currently charging $77, while Best Buy has it priced at $90. Amazon reviewers love it, giving it a 4/5 star rating from over 1,300 unique purchasers.

Update: If you prefer USB 3.0, Seagate – FreeAgent GoFlex Desk 2TB External $80

Back in stock!  Best Buy Clearance again offers the Seagate Expansion 2TB External USB 2.0 Hard Drive for only $60.  While the older USB 2.0 speeds are underwhelming, the massive size and low cost of this drive make it a winner. The only delivery option available is free in-store pickup.  Act fast, only limited quantities are available.

Today only, Staples is offering the Seagate Expansion 3TB Desktop USB 3.0 External Hard Drive for only $90, regular $120.  Staples is extending $12 instant savings and then you must apply coupon code “81587” to save another $10.  Please note you must add a small filler item to get your total to $100 in order for the coupon to be applied.

Amazon is offering the Seagate Expansion 2 TB USB 3.0 Desktop External Hard Drive for only $80 with free shipping, regular $140.  As a price comparison, this drive is currently selling for $110 at MacMall, $100 at Tiger Direct & Newegg.  Featuring USB 3.0 / 2.0 connectivity and massive storage, this Seagate drive is perfect for backing up your precious data.

Best Buy has the Toshiba Canvio 1.50 TB External USB 3.0 Hard Drive for only $90 with free shipping. This drive retails for $100.  But if you need something a bit more roomy, there is also a 4TB deal from earlier today.

eBay via BuyDig is offering a Western Digital My Passport 1 TB USB 2.0/3.0 Portable Hard Drive  for only $69 with free shipping.  As a pricing comparison, Amazon is charging $80 while Newegg has it listed for $90.  You choice of black, blue, silver and red.  Includes a 2 year warranty, only limited quantities remain.

My Passport offers high capacity in a sleek portable drive. It features ultra-fast USB 3.0 connectivity; compatibility with USB 2.0; automatic, backup software; and password protection and hardware encryption to help protect your files from unauthorized use. With up to 1.5 TB capacity, there’s plenty of room to store all your photos, music, movies and files.

For a limited time, Staples is extending a $30 discount on a Western Digital My Passport Essential 320GB Portable Hard Drive USB 3.0 making it only $40 with free shipping.

Put your digital life on the stylishly small My Passport® Essential™ portable hard drive. With WD quality and USB 3.0 and USB 2.0 connectivity, this drive is designed for today with tomorrow in mind. Visual backup software and password protection with hardware encryption ensure your data is protected. Lightweight and easy to carry, this drive is ideal for fast storage to go.

Staples is offering a Seagate Expansion 3TB Desktop USB 3.0 External Hard Drive for only $99 with free shipping.  This massive drive retails for $129.  Deal is only valid until 3/16.

Best Buy is offering the Western Digital My Passport 1.5TB External USB 3.0 for only $90 with free shipping.  As a comparison, the retail price for this drive is $130, Amazon is charging $120 and Staples $140.  It is unclear how long this deal will last so be sure to cash in on these savings now.

Efficiently transfer and store photos, videos and more with this WD My Passport external USB 3.0/2.0 portable hard drive that features ultrafast data transfer up to 5 Gbps and automatic backup software to keep your files safe.

Only until tomorrow, TigerDirect is offering a Western Digital 3TB Elements External Hard Drive for only $99.  This same drive retails for $150 and the next lowest price available is $129.  To cash in on these savings you must submit the $30 rebate.  Rebates aren’t always fun but this one nets you a massive hard drive…

eBay via Buy.com , is offering a Seagate Backup Plus 4TB USB 3.0 External Hard Drive for only $150 with free shipping. This drive offers massive storage at super fast USB 3.0 transfer rates. As a price comparison, amazon is currently selling this for $180 and Newegg $190.  Hurry because only limited quantities remain and…

Best Buy has the Western Digital My Passport 1.5TB External portable hard drive for only $99 with free shipping.  This same drive is currently selling at B&H for $125 and J&R at Newegg for $139.  This is USB 3.0 compatible supporting transfer rates up to 5 Gbps.

TigerDirect is offering some of the lowest prices we have ever seen on two Western Digital portable USB 3.0 external hard drives.  The 500GB version retails for $80 but is now available for only $35 after applying a $30 rebate.  There is also a 1TB version available for $54 after a rebate, this drive retails…

J&R offers the Western Digital 4TB My Book Essential USB 3.0 External Hard Drive, model no. WDBACW0040HBK-NESN, for $199 with free shipping ($0.05/GB). (B&H Photo-Video charges the same.) That’s lowest total price we could find by $42. It features USB 3.0 connectivity, automatic backup, and more.

At MacMall, search for “9000191-R” to find the refurbished LaCie 4TB USB 2Big Thunderbolt External Hard Drive, model no. 9000191, for $359.99 with free shipping ($0.09/GB). That’s the lowest total price we could find for a new unit by $209. It features data transfer rates of up to 327MB/s, dual Thunderbolt ports, dual cooling system,…