I use one called X-Plore. It’s actually very good. Even has a WiFi server, conpressed archive support, etc. but the downsides are that it’s close sourced and some features are behind a paywall (though IMO they are worth it).
So I was thinking of moving to some free or open source software. Any recommendations?
I use Mixplorer. It’s not open source, but it’s trusted, has no trackers, most of the libraries it uses are open source. It’s literally the best file manager i have found on Android.