diff --git a/scripts/backup b/scripts/backup
index db1050b..cc4b55f 100755
--- a/scripts/backup
+++ b/scripts/backup
@@ -27,38 +27,22 @@ ynh_backup --src_path="$install_dir"
 ynh_backup --src_path="$data_dir" --is_big
 
 #=================================================
-# BACKUP THE NGINX CONFIGURATION
-#=================================================
-
-ynh_backup --src_path="/etc/nginx/conf.d/$domain.d/$app.conf"
-
-#=================================================
-# BACKUP THE PHP-FPM CONFIGURATION
+# SYSTEM CONFIGURATION
 #=================================================
 
 ynh_backup --src_path="/etc/php/$phpversion/fpm/pool.d/$app.conf"
 
-#=================================================
-# SPECIFIC BACKUP
-#=================================================
-# BACKUP LOGROTATE
-#=================================================
+ynh_backup --src_path="/etc/nginx/conf.d/$domain.d/$app.conf"
 
 ynh_backup --src_path="/etc/logrotate.d/$app"
 
-#=================================================
-# BACKUP FAIL2BAN CONFIGURATION
-#=================================================
-
 ynh_backup --src_path="/etc/fail2ban/jail.d/$app.conf"
 ynh_backup --src_path="/etc/fail2ban/filter.d/$app.conf"
 
-#=================================================
-# BACKUP THE CRON FILE
-#=================================================
-
 ynh_backup --src_path="/etc/cron.d/$app"
 
+ynh_backup --src_path="/var/log/$app"
+
 #=================================================
 # BACKUP THE POSTGRESQL DATABASE
 #=================================================
diff --git a/scripts/install b/scripts/install
index 5461210..2b3ef22 100755
--- a/scripts/install
+++ b/scripts/install
@@ -75,6 +75,12 @@ exec_occ maintenance:install \
 #=================================================
 ynh_script_progression --message="Configuring $app..." --weight=8
 
+# Set the mysql.utf8mb4 config to true in config.php
+exec_occ config:system:set mysql.utf8mb4 --type boolean --value="true"
+
+# move the logs from the data_dir to the standard /var/log
+exec_occ config:system:set logfile --value="/var/log/$app/nextcloud.log"
+
 # Ensure that UpdateNotification app is disabled
 exec_occ app:disable updatenotification
 
@@ -231,7 +237,7 @@ chmod 750 $install_dir
 ynh_script_progression --message="Configuring log rotation..." --weight=1
 
 # Use logrotate to manage application logfile(s)
-ynh_use_logrotate --logfile="$data_dir/data/nextcloud.log"
+ynh_use_logrotate
 
 #=================================================
 # SETUP FAIL2BAN
@@ -239,7 +245,7 @@ ynh_use_logrotate --logfile="$data_dir/data/nextcloud.log"
 ynh_script_progression --message="Configuring Fail2Ban..." --weight=8
 
 # Create a dedicated Fail2Ban config
-ynh_add_fail2ban_config --logpath="$data_dir/data/nextcloud.log" --failregex="^.*Login failed: '.*' \(Remote IP: '<HOST>'.*$" --max_retry=5
+ynh_add_fail2ban_config --logpath="/var/log/$app/nextcloud.log" --failregex="^.*Login failed: '.*' \(Remote IP: '<HOST>'.*$" --max_retry=5
 
 #=================================================
 # END OF SCRIPT
diff --git a/scripts/remove b/scripts/remove
index a0f4ba6..121913f 100755
--- a/scripts/remove
+++ b/scripts/remove
@@ -16,6 +16,9 @@ ynh_remove_nginx_config
 # Remove the dedicated PHP-FPM config
 ynh_remove_fpm_config
 
+# remove logs
+ynh_secure_remove --file="/var/log/$app"
+
 # Remove the app-specific logrotate config
 ynh_remove_logrotate
 
diff --git a/scripts/restore b/scripts/restore
index 13d2fe6..f66ba4f 100755
--- a/scripts/restore
+++ b/scripts/restore
@@ -52,6 +52,12 @@ ynh_script_progression --message="Restoring cron job..." --weight=1
 
 ynh_restore_file --origin_path="/etc/cron.d/$app"
 
+#=================================================
+# RESTORE LOGS
+#=================================================
+
+ynh_restore_file --origin_path="/var/log/$app"
+
 #=================================================
 # BACKUP THE LOGROTATE CONFIGURATION
 #=================================================
@@ -108,10 +114,10 @@ ynh_restore_file --origin_path="/etc/fail2ban/jail.d/$app.conf"
 ynh_restore_file --origin_path="/etc/fail2ban/filter.d/$app.conf"
 
 # Make sure a log file exists (mostly for CI tests)
-logfile="$data_dir/data/nextcloud.log"
+logfile="/var/log/$app/nextcloud.log"
 if [ ! -f "$logfile" ]; then
 	touch "$logfile"
-	chown $app: "$logfile"
+	chown "$app:" "$logfile"
 fi
 
 ynh_systemd_action --action=restart --service_name=fail2ban
diff --git a/scripts/upgrade b/scripts/upgrade
index cc4a197..12ac677 100755
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -258,6 +258,15 @@ then
     # Update all installed apps
     exec_occ app:update --all
 
+    # move the logs from the data_dir to the standard /var/log
+    # it would be better in the ENSURE DOWNWARD COMPATIBILITY section
+    # but it must be after the exec_occ() definition, so it's here
+    if [ -f "$data_dir/data/nextcloud.log" ]; then
+        mv "$data_dir"/data/nextcloud.log* "/var/log/$app"
+        # adapt the nextcloud config
+        exec_occ config:system:set logfile --value="/var/log/$app/nextcloud.log"
+    fi
+
     # Load the config file in nextcloud
     exec_occ config:import "$nc_conf"
 
@@ -359,9 +368,9 @@ fi
 # Create a dedicated NGINX config
 ynh_add_nginx_config
 
-#-------------------------------------------------
+#=================================================
 # CRON JOB
-#-------------------------------------------------
+#=================================================
 
 cron_path="/etc/cron.d/$app"
 ynh_add_config --template="nextcloud.cron" --destination="$cron_path"
@@ -370,18 +379,18 @@ chmod 644 "$cron_path"
 
 exec_occ background:cron
 
-#-------------------------------------------------
+#=================================================
 # LOGROTATE
-#-------------------------------------------------
+#=================================================
 
 ynh_use_logrotate --non-append
 
-#-------------------------------------------------
+#=================================================
 # FAIL2BAN
-#-------------------------------------------------
+#=================================================
 
 # Create a dedicated Fail2Ban config
-ynh_add_fail2ban_config --logpath="$data_dir/data/nextcloud.log" --failregex="^.*Login failed: '.*' \(Remote IP: '<HOST>'.*$" --max_retry=5
+ynh_add_fail2ban_config --logpath="/var/log/$app/nextcloud.log" --failregex="^.*Login failed: '.*' \(Remote IP: '<HOST>'.*$" --max_retry=5
 
 #=================================================
 # END OF SCRIPT