Its easy to forget files on your Android unit.
The file manager apps on this list are free with minimal to no ads.
Most are frequently updated and well-received by other users.

Free Up Space: Files by Google
Suggests ways to free up space.
Backup files to your cloud account.
Share files offline with people nearby.

May change file formats when moving a folder with files.
Cant resume a failed file share.
Cant create shortcuts on Home screen.

Files by Google is completely free, has no ads, and is easy to use.
What sets Files by Google apart is its storage management features.
It also suggests files that can be deleted to free up space.

Quickly Transfer Files Between PC and Android: File Commander
Quick access tiles on Home screen.
Access files on Android equipment from a PC
Includes 5 GB of MobiDrive cloud storage.
Ads to upgrade to Premium can be annoying.

May be unable to move multiple files.
Need Premium version to convert file formats.
Clean up Files and Storage: File Manager by Astro
Connect to cloud storage accounts.

Backup apps to an SD card.
Set favorite files and folders.
Usage tracking may seem invasive.

Problems connecting to an SMB server.
No LAN or connection file access.
The Astro file manager also has an app manager and a storage manager.
Intuitive and simple interface.
Built-in image viewer, music player, and text editor.
Doesnt support RAR, TAR, or 7Z compresses files.
May not recognize USB storage devices.
File Manager + has all the basic file management features.
It also has tools to clear storage space.
Maintain Absolute Privacy: FX File Explorer
Clean and intuitive interface.
Lots of customization options.
Easy to switch between multiple windows.
Can be slow to copy files.
Installs a text editor app.
Difficult to select multiple files.
FX File Explorer promises users absolute privacy.
The app is free of ads, and all security permissions are optional.
You dont have to grant FX File Explorer permission to any part of your Android rig.
Theres also a built-in audio player, movie player, image viewer, and text editor.
Compress files in ZIP format.
Loaded with useful features.
Slow to move a file from a phone to a PC.
Cannot favorite files and folders.
Doesnt display hidden files.
It works like Windows File Explorer and theMac’s Finder.
The storage analysis also contains tools to delete and move these files.
View Root Files and Folders: File Explorer Root online window
Intuitive and easy to navigate.
View the root directory without rooting.
The free app is basic.
Customization options require an upgrade.
Doesnt show files on SD card.
It lists all the root directories and subdirectories on an Android equipment.
File Explorer Root web app manages files stored on your Android gear and cloud storage accounts.