A free program for Android, by Ferenc Hechler.
This is a free trial version of the USB stick manager, which can be used on Android devices that support USB OTG. The trial version is full-functional, but it has a time limit until December 31, 2016.
This works on tablets (like the Nexus 7 or Nexus 10) or phones (like the Nexus 5) with USB OTG ports but do not mount USB sticks. The trial version requires root rights. You will not need root rights when you install the full version.
The USB stick manager can be used with sticks of different formats. It can be used with FAT, FAT32, or exFAT formatted sticks. It can be used with both NTFS and with the Windows-formatting (for Windows .