I’m playing with a Surface Pro at the moment (very nice), and one thing that was not immediately obvious to me was how to easily eject USB external storage (drives, thumbdrives etc) without having to resort to right clicking the tiny icon in the task bar of Desktop mode.
Well I Googled it, and was unable to find anything that helped (except video guides which I hate), so after discovering it myself thought I would post this.
With the USB device attached, swipe in from the right to bring up the charms menu, then select settings (IMHO it should be directly here under devices, but no), and choose “Change PC Settings”. From this list select Devices and select the USB device you want to disconnect here. See the image below for a visual.
I hope this helps others… guess it depends where Google puts it in the search rankings.