Using multiple threads to read multiple large files on a hard disk (not SSD) is inefficient, because the magnetic head on the physical disk frequently moves back and forth, which is time-consuming and slows down the file reading speed, causing the client program to feign death and speeding up the disk scrapping process.Hopefully you can improve this bug in the next release.
Hey, from what i know the forums here is mostly used as a user based support forums. All the development specific stuff takes place at the github bugtrackers, the one for the sync client is located here: https://github.com/owncloud/client/issues