I’m using Nextcloud on a Raspberry Pi 3B+. All data is stored on an external USB-Stick. Now I wanna make a Backup on a second USB-Stick. Therefore I opened the nextcloudpi config page. Then remove the USB-Stick for data and insert the USB-Stick for Backup. I formated the new stick with “format external storage” on the config page. After that I change to the backup settings, correct the directory and click on “Apply”, but there I get an error “Error reading data directory. Is NextCloud running and configured?”.
Now it is impossible using Nextcloud. When I wanna open Nextcloud in the Browser the message “Internal Server Error…” occurs.
But when I remove the Backup-Stick from the Raspi, then Nextcloud works normal. If I insert the Backup-Stick again, same issue.
I checked, if the sticks are correct mounted, but all seems correct.
Does anyone have a solution?