Spent quite a chunk of this weekend also re-working my data storage solution. Moved all of my personal data from the Nextcloud install on Digital Ocean to my personal NextCloud box. Late last week I realised I was saving the data on the SD card and not on the connected external hard disk. Took me sometime to figure out how to point the default data location as the external drive. Nevertheless, got it to work finally. Was a pretty straight forward work around but should document this in detail sometime soon.
The NC Box is setup for the most part. I now need to figure out a backup solution for it. Will most probably tinker with Unison, Rclone over the next few weeks to sort this out.