Reboot and now error

Hi Guys
Can you help, i tried a number of times to do a power reboot but no luck .
I get this error

Likely a storage error. SD-card? Please give more details.

Hi
I am using a Derll 5070 mini PC and HA is running off a M.2 ssd drive and was working fine and after a reboot , it will not come up again

Google tells me that the error is related to storage and/or memory, so start there.