Don't wait for the "Full" error. Run a health check weekly.
Name your blocks like a filing cabinet.
If you currently save every block as an individual .dwg in a folder, you are losing time. Here is why the Host File method wins: autocad block host file full
Result: Every employee now sees the exact same "full" block library. If you update the host drawing, the tool palettes (if configured correctly) will source the geometry from the host file path. Don't wait for the "Full" error
To prevent your "full" library from being corrupted by junior drafters, set the master host file to Read-Only on your server. autocad block host file full
How to update without breaking links: