You've exceeded even the code server's capacity.
I recommend exporting individual images of procedures and events, using the Ai2Helper browser extension from
You will get a finer grain of backup that way, since the downloaded blocks images can be dragged into new projects' blocks editor workspaces.
The operation can be done in bulk, into a single .zip archive.
If you post the largest item in that .zip archive, it might spur discussion of ways to reduce block count.