In this technically diverse life, it is very hard to limit oneself to the products of only one manufacturer. And this makes life a little complicated when you want to access the disks formatted for one operating system on some other system, as some of the file systems of one operating system may not be supported by the other operating system. This is true even for the popular Android OS – it does not natively support NTFS used by Windows or HFS+ used by Mac OS. As such when you attach a USB stick formatted in NTFS or HFS+ to your Android smartphone through an OTG cable, it is not detected.
But you can easily add the NTFS, HFS+ and exFat support to your Android device using the free Paragon exFAT, NTFS & HFS+ app. This requires root privileges, so you must have a rooted Android device before you proceed.
After the installation of the Paragon exFAT, NTFS & HFS+, you can just attach the USB sticks to your Android device and it will automatically mount them. After this you can use any file manager to access your files. It also gives you options to manually mount or unmount the external storage media through its easy interface. You can also specify the folder where that storage media would be mounted.
In the advanced options section, it also has tools to check and fix the errors on any of the mounted external storage media. The checking and fixing tool shows the progress details in verbose mode just like the Windows chkdsk tool. You can also use the in-built tool to format the external storage media using the NTFS or HFS+ file systems.
Conclusion: If you are not able to access your NTFS, exFat or HFS+ formatted USB stick in your Android smartphone, then you can use the Paragon exFAT, NTFS & HFS+ to add NTFS, exFat and HFS+ file system support and easily access your files.
You can get the Paragon exFAT, NTFS & HFS+ from https://play.google.com/store/apps/details?id=com.paragon.mounter.