Is cloudstorage a safe storage?

Nextcloud looks like something i’d go for. If only to set up and play around with. Now to find suitable hardware. Maybe, like @Daemonicvs says, a Raspberri Pi. It’s low on powerconsumption, so that’s always a plus.

Mod edit, duplicate question:
Which brings me to another question, but for another topic. A firewall, yes/no?
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