I just received the mailing for crowdfunding Nextboxes and am hesitating on internal HD sizes.
Viewing the demo video I see it’s easy to create a backup onto an external HD, but the question for me is : will it be possible to plug a big external HD (like, 2 or 4Tb) and set Nextcloud to use that disk for its main storage.
In such a case I’d rather consider a Nextbox with more RAM and a smaller internal HD.
If external HDs can only be used for backup, I am bound to a big internal HD, and this somehow is a constraint.
I think a Nextcloud instance can do this (expand to an external storage), but I saw this long ago and never tried, so that feature may have evolved or even disappeared…
Second question : Up to now I’ve only experienced Nextclouds for basic file sharing. But the video explicitly mentions the Nextcloud videoconferencing app, and in the present situation this feature is more and more significant.
My question is : assuming the Nextbox is linked to a fiber connection (so in principle no or less datarate bottleneck), is it better to get more RAM in the device to support, say, a halfdozen-contacts videoconference? Or is the basic 2Gb sufficient? I don’t expect using more ambitious apps.
 I now read the FAQ on Kickstarter ! so I consider 4Gb RAM. Disk question remains open
A third question : while i didn’t use this feature for a while, I remember that a Nextcloud server can share files or directories with another, entirely separate Nextcloud server.
So, if I buy two Nextboxes, can I somehow set a cross-backup between the two, even if it is not a real sync, but for instance a folder from Nextbox A replicated automatically on Nextbox B, and another folder on Nextbox B automatically replicated on Nextbox A?
These Nextboxes won’t be collocated.
Last (but a bit futile) question : shall I be able to use my Nitrokey Storage USB key for a backup? (as this means somehow running the Nitrokey app on the Nextbox!) -but this is definitely not key for me