Ghost Commander is a dual-panel file manager (as well as a client for FTP, SFTP, SMB, WebDAV, Drive, BOX, and Dropbox!) which will let you to manage your files locally (on the same device) or remotely (on a different device, like laptop or cloud).
I use Ghost Commander every day.
Download from Google Play:
https://play.google.com/store/apps/details?id=com.ghostsq.commander&hl=en_US&gl=US
Download from F-Droid:
https://f-droid.org/packages/com.ghostsq.commander
