Ext4 File system corrupted in BPI-M64

Hello BnanaPi Team.

I have downloaded ubuntu mate operating from here. I have BPI-M64 single board computer. I have done operating system burn into emmc storage. After power plug in, the operating system was boot from emmc storage. Initially it will be working fine. Then after two days the file system was going to be corrupted. Continuously file system was got corrupted two times within a week. I want know the what would be the reason. How to overcome this problem. Awaiting for your reply. ext Thanks and Regards,

Amar Pulli.