ERROR:can’t cd into nextcloud data directory. Would like to be able to copy/move files in this directory to an external drive for backup.Missing permissions

To cd into the directory as sudo

Bash shell commands like “cd” can’t be “sudo’ed”, so do this:

$ sudo -i

now you can cd into the directory and do what you like.to exit:

$ exit

To list all files:

https://central.owncloud.org/t/cant-create-or-write-into-the-data-directory-cant-write-into-config-directory-data-directory-mnt-data-is-invalid/1255You have permission issues that the users which is running your webserver has no access to this folders. If you’re on e.g. Ubuntu/Debian this can be checked by running the following command:

$ sudo -u www-data ls -la /path/to/folder

this command should return a list of files / folders instead of a “Permission denied” message.in my case:

$ sudo -u www-data ls -la /var/www/data

See also:https://community.bitnami.com/t/how-to-access-the-owncloud-user-data-folders/30531/4