Last night I set up my Raspberry Pi Model 3B+ as a Samba Server with an External Hard drive. After connecting to it on one of my PCs, I went to sleep. I also had VNC Server set up on the Pi so I had disconnected the monitor at that point. When I woke up in the morning to check on it, the green light was off.
I had planned on backing it up this morning, and now I'm angry that I didn't, but does anyone have any idea about why this happened?