If you're not happy with the default Windows file manager, you're in luck because there are plenty of options that improve on the original.
XDA Developers on MSN
The Windows File Explorer was slowing me down, so I replaced it with this
It’s an excellent third-party file manager that prioritizes two things: speed and simplicity. If you are tired of waiting on ...
The default Android file manager is a serviceable app. It does what you need and not much more. Plus, like all built-in Android apps, it plays well with the operating system and has a consistent look ...
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