No external hdd or touchscreen after clean windows install

I re-installed win10 on my ASUS Q302LA laptop after completely wiping the c: drive using Ubuntu. I installed Ubuntu in order to delete the "Old windows" folder, which apparently can only be done from windows if you have god or "trusted user" status, whatever the hell that is. After installing over Ubuntu using win10 from an iso optical disk, the usb ports and device manager no longer register my seagate external hdd. Now this is scary because the seagate is a "backup" drive and now it's useless. It's still good and works fine with my hp elite so nothing's lost, but the idea that were I not to have a second computer my data would be unaccessible by the very products supposedly designed to keep it safe. The touchscreen feature is also non-functional. I'm not sure whether this is a win10 problem or an ASUS driver problem specific to this computer.