Large File Transfer - FAQ

Last Updated: 02/21/2018


Click on each section below to read helpful questions and answers about Large File Transfer.

General FAQ

How do I log in?

Go to and log in using your CU Login Name, e.g. buffalor, and IdentiKey password.

You can also log in using your primary email address. To find your primary email address:

  1. Log in to with your CU Login Name and IdentiKey password.
  2. Click Manage My Email Addresses
  3. The address listed under the Campus Published Email Address is the address to use.
How does the recipient log in to retrieve the file?

Off-campus users that do not have an IdentiKey must first receive an invitation to retrieve a file. When they enter the address in their browser to retrieve the file, they will be prompted to create an account. They can then use that account to download the file again, if needed. That account expires after 14 days.

How long is my file available for download by the person I sent it to?

Once the recipient has been notified that a file is ready to download, they have 14 days to retrieve it. It can be downloaded as many times as is necessary in the 14 days. In the event that the File Transfer service’s software must be rolled back to an earlier version, files may not be preserved.

What is Accellion?

Accellion is the company that provides the service functionality. The server and all of the data is located on-campus.

What is a fingerprint?

The file fingerprint is used to verify that the file that you sent or received was not corrupted or changed during transfer. It is based on the contents of the file and not the name of the file or the date it was created or changed. Click here to read more information about file fingerprint.

What is the file size limit for this service?

The largest file size you can send is 100 GB. There is no set limit on the number of files you can send.

What link do I visit to use the service?
Who can I send files to?

Any CU Boulder employee can send a file to any individual , on-campus or off-campus, with an email address. The service will not send files to email lists.

Who can send files through the Boulder Campus Large File Transfer Service?

Boulder Campus faculty, staff, and student employees can initiate file transfers to any email address. If you fall into one of these categories but are unable to use the service, contact the IT Service Center to get access. User accounts pre-registered for the service based on employment status at the Boulder campus.

Why would I use the CU Boulder Large File Transfer Service?

The Large File Transfer Service allows Boulder campus faculty, staff and student employees to safely send files that are larger than the email attachment size limitation; usually around 50MBs. Files are transferred over an encrypted channel.