You could just use Microsoft's Update Assistant or the Media Creation tool to upgrade to Windows 10, https://www.microsoft.com/en-ca/software-download/windows10, you'll find the necessary downloads and instructions here. If you just need/want to upgrade using a USB flash drive and ISO, you may need to use a USB 2.0 flash drive. From the last time I remember doing this, the issue was with using a USB 3.0 flash drive when trying to go from Windows 7 or older.
Please accept as an answer if this was helpful.