MaksL: From the task manager I've noticed that GalaxyClient Helper.exe process is constantly doing I/O writes, easily topping the chart of the process list doing even more writes than my download manager! Can someone explain what's going on? Why does it have to constantly write something?
I have an SSD and excessive writes will simply kill it over time. >.<
Not sure what the proper answer to that is but I see I/O reads/writes increasing over time in Task Manager as you show however in Resource Monitor under the disk tab, it doesn't show Galaxy doing any disk I/O whatsoever, so I would presume that this is entirely network activity of Galaxy talking to GOG's backend servers. Most likely it is push/pull of chat data/status and other similar synchronization going on at the network level. If you're not seeing any ongoing disk I/O in the disk tab of Resource Monitor then I wouldn't really be concerned about it. For much more detailed info though you could install Process Explorer from Microsoft/SysInternals, which is an optional download that is a far superior Task Manager replacement.
HTH