Indesign file won't save to Server but will save locally

Suddenly today, me and another user on the same network became unable to save Indesign files on any of our work servers. We can save Indesign files locally though. 

We get this message: "failed to save the file due to insufficient disk space. please free up some space and save file again server indesign"

• We can save files on all other adobe programmes such as Illustrator and Photoshop. 
• We can save on other non adobe programmes such as MS Word
• We have 48GB of free space on the server (the file is only 3mb)
• We are both using identical macBook pros. 
• We can save the Indesign file locally and copy accross to the server.
• All the linked files within the Indesign document are still conected to the server. 
• Indesign is uptodate and updated 8 days ago and has worked fine since then.