I've been using Mixplorer for years because is simply the best file manager on android, but I try just using open source.
But the reasons I'm finally moving is that it doesn't update regularly and a couple days ago I find it making connections to google and telegram.
I downloaded it years ago from apkmirror and update it via the app itself. It has never made those connections before until last week. I think that maybe the connection it made to Google fonts was because days ago (maybe a month ago) I changed the language and it needs to connect to the Internet to do so. But I can't find a reason to why it connected to telegram, which I don't use.