Android supports FAT32/Ext3/Ext4 file system. Most of the the latest smartphones and tablets support exFAT file system.

What is Android default file system?

since most of the devices use eMMC,the file system android uses is ext4,except for the firmware.refer- Here is the filesystem on galaxy s4: /system ext4. /data ext4. /cache ext4.

Does Android have a file system?

Device Root: Your Android device also has a special system filesystem where its operating system files, installed applications, and sensitive application data are stored. Most file manager apps can’t modify this file system for security reasons, unless you have root access, and a file manager capable of using it.