Note: Please Disconnect the webdav connection when you finish your work, as the webdav session expires after eight hours.
(Leaving a webdav connection open poses a security risk.)
After that time is up, if you have NOT disconnected, you will be prompted to re-authorize via 2FA, repeatedly, until you respond.
If you do not respond, your duo account will get locked.
A possible other option is to use the 24-hour-valid “JWT”. To get one go here

Finder (Mapping to a Network Drive)

Start Finder, click Go, and from the drop-down list, select Connect to Server….
From the Go drop-down list, select Connect to Server...
In the Server Address: text box, type the appropriate address.

To access your departmental Web site, type: https://webdav.hosting.vt.edu/www.ABC.vt.edu but replace ABC with the name of your site.
To access your student organization Web site, type: https://webdav.org.vt.edu/www.ABC.org.vt.edu but replace ABC with the name of your site.

Click the Connect button.
Click Connect.
If prompted by an authentication window:
Click the Connect button.
In the Name: text box, type in your PID (not alias),which is the first part of your @vt.edu email address.
In the Password: text box, type in your VT password (not your Hokies password).
(If you choose to use the 24 hour JWT, copy and paste it in the password text box.)
(If you have forgotten your password, follow the instructions at Forgot PID Password.)

Click Connect.
Two-Factor Authorization will occur via your default method of 2FA
If your default method is phone, you must answer your phone and follow the directions
If your default method is push, you will be prompted to authorize via the Duo AppThere are three possible ways you will be asked to give your approval for 2fa:

Phone is locked

If your phone is locked, a popup will show (left in image below), press on “Login Request”
Press “Approve” (or Deny) (middle image below).
After pressing “Approval” you will be prompted for your passcode/fingerprint/login for your phone (last image below)

Phone is UN-locked

If your phone is un-locked, a popup will show (left in image below),
Open the duo app (middle image below).
After pressing “Request Waiting. Tap to Respond…” you will be prompted to “Approve” again. (last image below)

Phone is UN-locked

If your phone is un-locked, a popup will show (left in image below), press on that “Login Request”,
Choose “Approve” (or Deny) (right image below).

Another window will popup showing all folders and files in the site.