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First android I ever had was a Galaxy S2. Goddammit that phone was so nice. I even bought a 2nd one when the first one died. But android file trees are way easier to navigate than iOS.
There's a app called files that takes you to your saved storage, it's not even difficult
And Fossify File Manager if you don't want to deal with Google.
If you're using a stock android device, the OS on your phone still has permissions to read and write to storage, by necessity. If what you're concerned about is privacy, you have very limited ability to set storage scopes if you don't trust the OS, and this doesn't really change if you install an app.
If you're using fossify file manager or any other file manager, you've given that app+the default Files app access to your storage. This is not more private. Most of those similar apps are essentially just skins on top of the default manager (which I suppose could be useful). This only really adds attack surface and doesn't have any meaningful privacy benefits, and potentially some detractors depending on the app you use.
If you don't trust the operating system and its utilities, the best option is to find an operating system you trust, and not to just install new skins on top of existing apps.
You probably can disable google files on most phones(and similiar google apps, even though not completely)
No I was alluding to the fact that google files layout I find difficult to work with.