Large (>5MG) assignment files submitted with googledocs do not download.

When using googledrive as a repository for uploading assignments, if the assignment is too big (>5MG), an rtf file is generated with the following message:

Google Drive. The converted attached .rtf contains only error text:

"error": {
"errors": [

{ "domain": "global", "reason": "exportSizeLimitExceeded", "message": "This file is too large to be exported." }

],
"code": 403,
"message": "This file is too large to be exported."
}

Need to include a warning about the file size and if possible a way to increase the file size, and or another way to get the file if the json string returned has this error message.