Please help us by providing the following info. Before posting please also check the pinned "Known issues" threads and make sure that you're running the latest available version for your oC release: https://owncloud.org/changelog/
Steps to reproduce
* I am trying to download a big file (over 1~3GB) through web interface by clicking (...)>Download
* I am trying to synchronise a big file (over 1~3GB) through synchronisation client
Expected behaviour
Download/Sync succeeds
Actual behaviour
Download/Sync is being dropped after couple of GBs
Server configuration
Operating system: Raspbian (Debian)
Web server: Apache/2.4.10 (Raspbian)
Database: mysql Ver 14.14 Distrib 5.5.44, for debian-linux-gnu (armv7l) using readline 6.3
PHP version: 5.6.19-0+deb8u1 (cli) (built: Apr 2 2016 20:48:04
ownCloud version (see ownCloud admin page): 9
Updated from an older ownCloud or fresh install: from 8.2
Special configuration (external storage, external authentication, reverse proxy, server-side-encryption): External local storage
Integrity status for oC9+
500 - Internal Server Error