A:AnswerYes. You can plug this flash drive into computer and uninstall and reinstall the apps that you don't use frequently to the flash drive. That will free up space on the hard drive to allow you to install Windows 10.
A:AnswerNo, you cannot use this flash drive to download photos from an iPhone. You are going to want a Lightning flash drive like this one: https://www.bestbuy.com/site/pny-duo-link-on-the-go-128gb-usb-3-0-apple-lightning-flash-drive-metal-gray/6033400.p?skuId=6033400