At $0.00003 per megabyte, the Seagate Expansion 8TB external hard drive is the cheapest way to store data that currently exists in consumer hardware, and it comes with Rescue Data Recovery Services included in case the drive ever fails. Amazon has it at $249, off its $279 standard price, for 8 terabytes of plug-and-play USB 3.0 storage that works with Windows and Mac out of the box without drivers or software installation. No Prime membership required.

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$0.00003 per megabyte puts the cost of storage in perspective

A standard smartphone photo taken at 12MP is roughly 4 to 6 megabytes. At $0.00003 per megabyte, storing that photo on the Seagate 8TB costs approximately $0.00015 to $0.00018, which is a number so small it doesn’t exist in any practical budget discussion. A 4K video file at 10 gigabytes costs $0.30 to store. An entire year of daily smartphone photos at an average of 20 shots per day costs roughly $1.10 to store for the full year. The 8TB capacity holds approximately 2,000 hours of HD video, 160,000 RAW photos, or the complete music library of most households many times over at a per-unit cost that cloud storage services can’t approach on a per-megabyte basis.

Cloud storage at Google One’s 2TB tier costs $9.99 per month, which is $119.88 per year for 2TB, or roughly $0.000059 per megabyte annually on an ongoing basis. The Seagate 8TB at $249 is a one-time purchase at $0.00003 per megabyte for four times the capacity, with no monthly billing, no internet dependency for access, and no service cancellation risk for stored files. For anyone storing large volumes of photos, video, music, or backup data that doesn’t require constant cloud accessibility, the math strongly favors physical storage at this price per megabyte.