Windows Upgrade Help and more

This. Yeah, that error can be a pain. Try temporarily disconnecting any non-essential USB devices before running the upgrade again.

I'm trying to upgrade my Windows 10 PC to Windows 11, but I'm really nervous about my files. The upgrade assistant keeps giving me a weird error code: 0xC1900101. I've heard some people lose data during this process. What's the absolute safest way to back up everything before I try again? I have ...