Recently my eTrex 30 has started hanging when I connect it to my computer. It gets to "Saving all waypoints, routes and trip log information in GPX format. 99% complete." then it gets stuck and never goes to the USB connection verification screen.
I'm using Windows 10 and firmware 4.30.
https://support.garmin.com/en-GB/?faq=jCRy8hkBSR0xpBFA1vCcN7&searchType=noProduct&utm_source=faqSearch did not rectify the situation, although it did allow the computer to recognise the device and backup it did not work the next time