Da die Standard Speichereinträge nicht ausreichen um größere Dateien mit owncloud zu laden muss in Plesk
folgendes angepasst werden:

1. Connect to the server using SSH
2. Run the following command in order to add ‘client_max_body_size 128m;’ to the configuration of nginx:

# echo 'client_max_body_size 128m;' > /etc/nginx/conf.d/aa_client_max_body.conf

As a result, 128m will be the default value of ‘client_max_body_size’ directive server-wide. Any other value can be set here.

3. Add the following lines to the /usr/local/psa/admin/conf/panel.ini:

nginxClientMaxBodySize = 

If the panel.ini file does not exist, create it using sample file:

cp /usr/local/psa/admin/conf/panel.ini.sample /usr/local/psa/admin/conf/panel.ini

Make sure that permissions of the file /usr/local/psa/admin/conf/panel.ini are correct, otherwise the workaround will not work:

# ls -la /usr/local/psa/admin/conf/panel.ini
-rw-r--r-- 1 root root 1857 Nov 26 11:03 /usr/local/psa/admin/conf/panel.ini

4. Regenerate NGINXApache configuration files for all vhosts to apply changes in /usr/local/psa/admin/conf/panel.ini:

# plesk sbin httpdmng --reconfigure-all

As a result, there will not be ‘client_max_body_size’ directive defined in vhosts’ configuration files.

5. Restart NGINX:

# service nginx restart

6. Now it is possible to specify custom value of client_max_body_size in Domains > example.com > Apache & Nginx settings > Additional nginx directives per domain, i.e:

client_max_body_size 512m;