I can't save, open or export in InDesign

Hi,

InDesign works fine. But when I want to save a file to the intern Mac HD the cursors loading animation appears for 15 seconds or so while InDesign freezes. After it unfreezes it didn't saved anything. Same occurs for exporting to and opening files from HD. I can save in the cloud and open files from the cloud though.

InDesign and Mac OS have the latest versions.

I really need help! At least a quick workaround because I have to finish comercial projects and put my files to the agencys server at the end.