I have an android 6, from archos, which is relatively clean in term of vendor layer. I regularly go in the storage part of apps, and despite the fact that I do

I have an android 6, from archos, which is relatively clean in term of vendor layer. I regularly go in the storage part of apps, and despite the fact that I don't use many apps, they still manage to generate megabytes of data, which are not clean by the "clean cache" functionality. I'm not using it for texts and calls, I only use it with wifi, but still, I have low trust in the android ecosystem.