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I have my cloud backup with Onlime and I am very happy with it. Easy to maintain and easy to work with on both my computer and mobile.
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Basefolder - Use your home PC as your own personal cloud storage server.
Backblaze B2 Cloud Storage - The lowest cost cloud storage on the planet: $0.005/GB/Month
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Jottacloud - Safe cloud storage
MiMedia - The personal cloud you've always wanted