How do you share images as a file system without pushing images to a shared repository or docker hub?

Docker Hub
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how do you share images as a file system without pushing images to a shared repository?

Also, is there any reason why copy pasting into a docker shell on windows very very slow? as if the paste takes many many minutes, the larger the copy the larger the paste time? Or is it do with docker MINGW64 terminal? Is there a way to increase buffer space or ?

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I figured out we can save the images as tar and export back again until we get a private repository.