5C not mounting on MacOS 10.13.3- Dashboard sees 5C

My 5C suddenly stopped mounting on my MacBookPro early 2011(MacBookPro8.3). It was working fine but suddenly does not mount anymore but is visible trough Drobo Dashboard.I have a few Tb of pictures on the Drobo…

Both Dashboard and 5C have the latest software/firmware. I had trouble setting up Time Machine since High Sierra but managed to have it work for a few days now by preventing “~/library/mobile documents” to be backed-up.

Does it have anything to do with this?

Restarted everything, in all orders possible but no success. Disk Utility sees the Drobo drives, but does not mount them.

Please help!