Up to 1.6TB of data can be stored on a single LTO-4 tape.
[Info from Quicspecs:
HPE believes that LTO Ultrium tape technology will continue to play an essential role in meeting the challenge of digital storage in the future, when the amount of unstructured and archive data is projected to run into trillions of gigabytes.
Although utilising the cloud for some of this cool or cold data should certainly be an option, with global data creation and replication expected to experience a compound annual growth rate of 23% out to 2025 (source: IDC, 2021), the cost of retrieving even a fraction of that data on a regular basis from a cloud provider could cost around 80% more than comparable tape infrastructure (source: ESG, 2020). ]