I think an organization is not an account. An administrator or more are assigned to an organization and he/she/them manage it. You must to login using your administrator account credentials and then you can manage your organization.
You can find more information about GitHub Organizations here.
GitHub storage limits as of Sep 2015
Per repository git file:
100 MB (strict)
GitHub will warn you when pushing files larger than 50 MB. You will not be allowed to push files larger than 100 MB.
https://help.github.com/articles/working-with-large-files/#conditions-for-large-files
Per repository:
~1 GB (recommended)
We recommend repositories be kept under 1GB each. This limit is easy to stay within if large files are kept out of the repository. If your repository exceeds 1GB, you might receive a polite email from GitHub Support requesting that you reduce the size of the repository to bring it back down.
https://help.github.com/articles/what-is-my-disk-quota/#file-and-repository-size-limitations
Per repository binary
release file:
2 GB (strict)
We don't limit the total size of your binary release files, nor the bandwidth used to deliver them. However, each individual file must be under 2GB in size.
https://help.github.com/articles/distributing-large-binaries/
Per account:
No limit
GitHub doesn't have any set disk quotas. We try to provide abundant storage for all Git repositories, within reason.
https://help.github.com/articles/what-is-my-disk-quota/#content-wrapper
GitHub large file support (filesize >100 MB)
GitHub supports large file storage for all Git repositories with Git LFS — a new, open-source Git extension.
An outline for the development, originally called GitHub Asset Management System, a large file asset management system for GitHub:
- 22 Sep 2013 -- committed to GitHub.
- 08 Apr 2015 -- Large file support for GitHub was announced and early access made available.
- 01 Oct 2015 -- git-lfs is released to all accounts, large files are supported for free up to 1 GB per account and a monthly bandwidth quota of 1 GB. Higher quotas are available for purchase.
GitHub bandwidth limits
Repository git files bandwidth limit:
not significantly greater than average GitHub user
If your bandwidth usage significantly exceeds the average bandwidth usage (as determined solely by GitHub) of other GitHub customers, we reserve the right to immediately disable your account or throttle your file hosting until you can reduce your bandwidth consumption.
GitHub Terms of Service section G item 12
Repository binary
release files bandwidth limit:
No limit
We don't limit the total size of your binary release files, nor the bandwidth used to deliver them. However, each individual file must be under 2GB in size.
https://help.github.com/articles/distributing-large-binaries/
Best Answer
Following the instructions in the URL, I CDed to the repository folder. I typed filename in the following command instead of the full path and it worked:
git filter-branch --force --index-filter "git rm --cached --ignore-unmatch filename" --prune-empty --tag-name-filter cat -- --all