We've set the maximum attachment size to the largest size OnDemand JIRA will allow (2 gigabytes).
Is there an extra charge for uplaoding and storing such large files? What is the total amount of space we are allowed to store OnDemand?
Finally, is there any way to monitor how much space we are currently using?
Information about these limits can be found here: http://confluence.atlassian.com/pages/viewpage.action?pageId=253231650
There's currently no way to monitor the current amount of space used, but you can submit a support issue and an engineer can let you know.
Ask login details for https://transfer.atlassian.com/ and ask Atlassian to extract and move the files to your webdav root