ReadyNAS couldn't update Antivirus, then System volume 'root' usage was 85 %, now I can't boot...

UPDATE:

I know it's been a while, but for anyone interested in this case, mdgm ended up fixing the problem enough to allow me to get into FrontView (which has been helpful, though I unfortunately don't know what he did). Meanwhile, I've been slowly attempting to migrate items from my lower-capacity NAS onto my higher-capacity NAS in an effort to gradually make more space in general (given that it's come to my attention that 90%+ capacity usage can start generating errors and strange behaviour).

On the flipside, since the previous remedy was employed, I've been unable to successfully interact with the 'System> Settings> Services' items; as a result, it's been a gruling process to move items, given that I no longer have access to SMB. There are no errors or warnings in the logs, but the consistent [detailed] response to my immediate attempts is: "Unable to start or modify service. Code 15002030001".

I haven't made a new case for this yet (nor am I sure if that would even be the appropriate course of action), but for now I'm focusing on offloading whatever I [safely] can. At this stage, I have the same error when attempting to enable Antivirus and SSH (both of which are off as a result).

I've casually sought out solutions, but haven't found anything concrete yet. If anyone has any suggestions or ideas, I'm open to hearing them.  :smileyhappy:

Thanks in advance.  :smileyhappy: