Hi @Breno_Nunes,
It sounds like you’re running into a limit on AppScript download times rather than something on Coda’s side. You may want to parallelize your downloads in your AppScript if you haven’t done that already.
Or, alternatively, store the images authoritatively in Google Drive and update your Coda doc to load images via Image URL pointing to Google Drive. That way, you can avoid the need for backup completely? Obviously this depends on your use case and may not be viable for you.