Check Whether Your Account Has Globus Plus Access and Upgrade if Necessary

Login at globus.org and go to the Account page — it should contain an Identities section followed by a Globus Plus section.
Under Globus Plus, the presence or absence of a message like "You have Globus Plus, because..." will show whether or not it is a Globus Plus account.
If you need to request Globus Plus access:
- In the Globus Plus section, select an organization from the drop-down list. Note that "University of Wyoming" is NOT an available choice here, and "Advanced Research Computing Center" is the option that needs to be chosen. Follow the instructions on the page loaded by making this choice, or email arcc help @ UW (authorized users have access to an email address through other sources) if you have any questions or problems with this.
- Another way to be added is for an existing member of the "Advanced Research Computing Center" group to invite you to join, which will generate an email from Globus requesting confirmation from you. When this confirmation is received, the process of adding you to "Advanced Research Computing Center" (with Globus Plus access) will be completed.

To Share a Personal Endpoint

Set personal endpoint configuration to allow sharing: Start the Globus Connect Personal application, and in its main menu:
- On Linux, go to File→Preferences and for the necessary directory/directories, check "Shared", and click 'Save".
- On Mac, go to Preferences...→Access and for the necessary directory/directories, check "Shareable".
- On Windows, go to Options...→Access and for the necessary directory/directories, check "Shareable", and click "Save".
Make sure that Globus Connect Personal is running on the personal endpoint and its status is "Connected".
Login at globus.org and go to the Transfer Files page. For one of the endpoints, select the personal endpoint to share. Navigate to the particular folder to be shared, and single-click the folder name to select it.
Click the menu icon in the top right corner of the navigation box and choose the option "share".

This loads a page to create the share, with the endpoint and path already selected. Enter the "Share Display Name", and optionally a Description, and click "Create".
Note: If attempting to share an endpoint gives the error "The backend responded with an error: You do not have permission to create a shared endpoint on the selected path. The administrator of this endpoint has disabled creation of shared endpoints on the selected path", this means that the endpoint isn't correctly configured to allow sharing (as described above).
On the next page, select the user or group to share the endpoint with, and the sharing permissions (read-only or read-write), and follow the prompts on the page to add the permission.

Make sure that the machines hosting both personal endpoints are on, and that Globus Connect is running and has "Connected" status on both of them.
Using the web or command-line interface, initiate a transfer between the endpoints as normal.