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GOG galaxy is not frendly to people with huge games library (1k+).

When you have many games on multiple platforms (5k) it takes at least hour to import into library. And ususally it breaks during import so you have to restart galaxy.

Please add option to DISABLE automatic import and ADD BUTTON to manualy launch scaning and importing games from accounts, preferrebly you can select each platform individually.

This will solve many problems.

or check page, how it handles sync imporitng into database 10k games in minutes.