A cloud storage service
If you need to backup your important files(like offline bitcoin wallet on your HDD, byteball wallet on your HDD, etc) on online services then you can use syphus.
There's a free plan on syphus, so if you need to backup files less than 10 GB, you can use the free plan, no need to pay at all.
Max files you can store on syphus is 500 GB(the most expensive plan).
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syphus
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