Default [Q] pls. help me to root as i am running out of space

Pls help..... Once I have tried to root using the "root land" app but I don't know anything about it;I somehow bricked the device so when I again tried to root & swap the external memory as suggested by a video tutorial by c4e tech on you tube I'm unable to do so because when i go through the# recovery mode # as suggested by the tutorial an android logo showing a Danger sign is there which isn't earlier there & all the options aren't working. so pls. Help me what to do before rooting & there afterestep wise as I am new to android. Suggests me a simple way to do so . thx in advance for the help