How can I check the state of the My Home Cloud Duo filesystem? There is no info about the OS or the filesystem used internally by the device.

My Cloud Home and Home Duo are Android OS, 4.1.17 kernel and EXT4 file system.
Access via ssh or adb is not possible.

Thanks for the info. Is there anything I can do to check the disks or filesystem?

My Cloud Home is not the typical NAS (network attached storage device) and does not present a dashboard, disk or file system check tools to the end user.