Download of big files stops

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Nextcloud Version
Shared Host (Strato)
PHP Version 7.1


  • no complete download of big files with browser possible
  • download always stops between 250 and 300MB

Does anybody know the reason for that behavior?
Are there settings for changing the behavior?

In the log of the download I cannot find a deviation:
{“reqId”:“XXXXXXXXXXXXXXXXXX”,“level”:1,“time”:“2018-08-15T19:25:45+00:00”,“remoteAddr”:“”,“user”:“NAME”,“app”:“admin_audit”,“method”:“GET”,“url”:"/nextcloud/remote.php/webdav/temp/",“message”:“File accessed: “/temp/””,“userAgent”:“Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:61.0) Gecko/20100101 Firefox/61.0”,“version”:“”}

Can I find additional information somewhere else?