I have 10+ (years) guitar with new steel strings and I was just playing around trying to tune it to Drop D however the 6th string snapped while in the process. I'm a newbie in guitars so I was just wondering if you need a special type of guitar or maybe a special set of strings? I appreciate it's quite a newbie question however is this the case? Do I need a new guitar to be able to tune it to Drop D or maybe a special type of strings?
This should be possible with any type of guitar. Since you are detuning the low E string, i.e. there is less tension overall, this should not be the cause of string breakage.
What were you using as a reference tone, are you sure you were tuning the guitar correctly?