QNAP TS464 Unmounted DataVol1

[Enquiries]

Hi, I have a QNAP TS464, all been working fine until this evening when it warned me about running out of Snapshot space. I then recevied warmings about the Datavol1 being unmounted. I have tried to check the file system but it fails after 1%. Tried restartig numerous times but that doesnt help. There is a red light on front of the NAS, top light. The NAS is about 2 months old and in good health. How do I remount the DataVol please?

Would really appreciate some guidance.
PS, Im not that IT savvy.

Thank you