I am trying to make a backup of home as described here https://www.raspberrypi.org/documentati ... /backup.md
using the tar command but I keep getting this error message
tar (child): pi_home.tar.gz: Cannot open: Permission denied
tar (child): Error is not recoverable: exiting now
I want to back this up to do a fresh install of NOOBS on a bigger SD card and then restore the backup.