If there was a simple all-in-one device you could buy to become part of IABAK, I'd probably do it. Embedded firmware, off-the-shelf terabyte hard drive... they could double or triple their userbase.

I wonder if the NextCloud Box could be adapted for this? https://nextcloud.com/box/ It's basically a hard drive in an enclosure, space for a raspberry pi 2 and some software on an sd card [Snappy Ubuntu Core as OS, nextcloud etc installed].

I've thought about building an IA.BAK extension for typical NAS software like Synology's DSM, QNAP's QTS, etc. Unfortunately, I've found that these platforms don't come close to the developer friendliness we've come to expect from app or extension stores - probably one of the reasons why there aren't really all that many extensions available on those devices.

Anyway, I'm hoping that situation will improve - unused NAS space would be a pretty big addition to IA.BAK, and you can't beat the UX of just installing an extension on a device you might already own.