Ncp-update error

Hi.

I was trying to update NC with : sudo ncp-update but I receive this error.

NextCloudPi v1.10.0 is outdated
update to v1.16.1 through ‘ncp-config’ or type ‘sudo ncp-update’

anthony@nextcloudpi:~$ sudo ncp-update
[sudo] password for anthony:
Downloading updates
Performing updates
{“reqId”:“8Gxp9R0i6a8UFNof4lff”,“level”:2,“time”:“2019-09-06T11:39:15+00:00”,“re moteAddr”:"",“user”:"–",“app”:“no app in context”,“method”:"",“url”:"–",“messa ge”:“Temporary directory /media/USBdrive/ncdata/tmp is not present or writab le”,“userAgent”:"–",“version”:“16.0.4.1”}
{“reqId”:“8Gxp9R0i6a8UFNof4lff”,“level”:3,“time”:“2019-09-06T11:39:29+00:00”,“re moteAddr”:"",“user”:"–",“app”:“PHP”,“method”:"",“url”:"–",“message”:“fopen(/m edia/USBdrive/ncdata/data_dir_writability_test_5d724568e3938.tmp): failed to open stream: Read-only file system at /var/www/nextcloud/lib/private/legac y/util.php#796”,“userAgent”:"–",“version”:“16.0.4.1”}
Your data directory is not writable
Permissions can usually be fixed by giving the webserver write access to the roo t directory. See https://docs.nextcloud.com/server/16/go.php?to=admin-dir_permis sions.

An unhandled exception has been thrown:
Exception: Environment not properly prepared. in /var/www/nextcloud/lib/private/ Console/Application.php:166
Stack trace:
#0 /var/www/nextcloud/console.php(96): OC\Console\Application->loadCommands(Obje ct(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\ Output\ConsoleOutput))
#1 /var/www/nextcloud/occ(11): require_once(’/var/www/nextcl…’)
#2 {main}{“reqId”:“8Gxp9R0i6a8UFNof4lff”,“level”:3,“time”:“2019-09-06T11:39:29+0 0:00”,“remoteAddr”:"",“user”:"–",“app”:“PHP”,“method”:"",“url”:"–",“message”:" fopen(/media/USBdrive/ncdata/nextcloud.log): failed to open stream: Read-onl y file system at /var/www/nextcloud/lib/private/Log/File.php#139",“userAg ent”:"–",“version”:“16.0.4.1”}