Hey Lucid users -- if you are seeing the "Creator has filled storage" error it means that the document owner who has shared this file with you has filled their allowable space. You can check who the document owner is by clicking the Share button in the top right corner and then clicking Manage in the bottom right of the pop out window.
If you are needing to edit immediately as a workaround you can make a duplicate of the document by clicking File > Duplicate. This will make you the owner of the duplicate and allow you to continue your work.
Hope this helps! 
