Amazon is currently shipping the Portable 4 TB External Hard Drive Seagate Expansion for $79.99. Selling normally for $120 marks a new all-time low on Amazon. With USB 3.0 connectivity, expect transfer speeds of 120MBps to be enjoyed.

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The 4 TB hard drive from Seagate is perfect for on-the-go Time Machine backups and more. Note: Amazon has delayed shipping until 15 August. More than 11,200 customers left a rating of 4.1/5 stars.

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Those who don’t have to add 4 TB of storage to their bag will find the 2 TB Portable Drive Expansion at $60 as a notable alternative. You cut the available storage space by half for $20. But even 2 TB is sufficient for mobile backups and much more.

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