The “Allow connected device to access files?” is a notification that appears once you connect the USB-C Link cable to your PC and your Meta Quest 2/Quest Pro VR headset. It basically tells you to give the PC permission to access files on the headset.
However, this pop-up notification might not appear if you accidentally clicked the “Deny, and don’t show again” option.
To enable it back, watch this video guide that will show you how to enable the Link USB dialog window again so you can Allow the connection.
I hope you find this Meta Quest 2 guide useful. For more guides, make sure to visit my SpookyFairy YouTube channel. Thank you.