Best file manager on android hands down. This fully equipped file manager is open source and has no adds or bs premium version needed to get full function. Every android user should have this app also installed it on my sisters device and she is not technical and uses it with ease. It gets great speeds over ftp on all my devices and does not seem to over consume resources like many others. A slight learning curve to get the hang of it may be needed for novice users but the time is well invested. Even supports custom colors out of the box.Also supports private key authentication over ssh.
October 30 2016