Large File Transfer Help

Last Updated: 02/23/2018


The instructions below detail how to access and use the Large File Transfer service.

How do Boulder Campus Faculty, Staff, and Student Employees log in to Large File Transfer?

Log in by email address and Identikey password

  • Use your primary email address and IdentiKey password.

To find your primary email address, log in to , click on Manage My Email Addresses, and the address listed under Campus Published Email Address is the address to use.

  • Email accounts are pre-registered for the service and are based on the CU Boulder white pages directory. If your name or email address doesn't appear in the directory, contact the IT Service Center to get access.

Log in by CU Login Name and IdentiKey password.

  • You can also enter your CU Login Name into the Email Address field and your IdentiKey password into the Password field.

Large File Transfer Login

How do I login to Large File Transfer?

Large File Transfer Service is a web-based program

How do I send a file?

Log into the Large File Transfer Service and click the Send File tab. Enter the email address of the recipient, and click Choose File or Choose from File Manager to attach the file you need to share. When finished filling in all necessary information, click Send

How do I send multiple files?

The best way to send multiple files or a folder of files is to compress them into a single .zip file and then upload to the file transfer service. 

Create .zip files on macOS

  • Select the files or folders you need to compress
  • Right click (or control + click) on the selected files
  • Choose Compress
  • The .zip file will appear for you to upload

Create .zip files on Windows

  • Select the files or folders you need to compress
  • Right click on the selected files
  • Select Send to > Compressed (zipped) folder
  • The .zip file will appear for you to upload

How do you invite a student or an off-campus associate to send a file?

If you would like to give a student or off-campus associate access to the CU Boulder Large File Transfer service so he or she can send you a large file securely, follow these steps:

  • Log in to
  • Click on the Send File tab.
  • Click on the Invite button.
  • In the window that opens, enter the associate's email address and a personal message, then click Invite.

The associate will receive an email message with a link that will allow the associate to accept the invitation. That link will send the associate to a form to set up their account. The invitation link is only valid for 72 hours.

The account will expire after 14 days. If the student or associate still needs access, send another invitation.

How does a Recipient log in to Large File Transfer?

When you send a file to an off-campus associate who doesn't have an IdentiKey, the recipient will be provided a link to access your file. To retrieve the file, the recipient will be prompted to create an account. They can then use that account to download the file again, if needed. The recipient's account will expire after 14 days.

The recipient will not be able to send a file back to you. If you need them to have that ability, invite the recipient using the Invite feature.

How long are files available after being sent?

All files will be deleted from the system after 14 days.