ZUGate

This app not only allows me to copy to/from NTFS & exFAT volumes (on devices that lack support for these file systems), it also mounts these volumes so other apps (Opera, Files by Google, various downloaders, etc) can write to them. Also it can create/manage encrypted folders. Oddly the app's integration with Playstore payment services is broken. Let me know when it's fixed; I want to donate.

great app, and free. excellent for power cuts so I can plug a USB drive into my phone to watch movies etc. unfortunately the videos always freeze, usually after only a few seconds. if I copy them to the phones internal storage or SD card they play fine though.

Alternative USB OTG reader. Found it by accident on Playstore and still impressed by the capabilities. If stock file manager can't access or read USB formated other than Fat16/32, extFat or NTFS this App did it all! It can read and access multiple partitions on the stick or even hard drive (external power supply recommended). You can mount them separately in RO/RW mode and copy/move/delete data directly. App will even make USB drives visible to other Apps on your device! Great work:-)