Hi,

I'm a noob but did my first restringing on an electric a few weeks ago, it went quite well.

Are your's nilon or steel strings? Where did it snap? Is it possible that it got kinked when locking to the bridge?

Snapping from too much tension feels weird, because from what I saw, after installing the string, the tension was much lower than what's needed for the correct tunning and it was already locked in place.

While locking, I was lifting the string a bit from the fretboard so that the "bend" at the bridge becomes softer. Don't know if it makes sense, but at the time I was afraid to kink the string and snap it.