[AC Question]

I have a LG OPTIMUS with very low internal memory. How do I transfer and save downloaded music to my sd card

[B. Diddy]

Welcome to Android Central! From where are you downloading the music? If it's from Google Play Music, you probably can't, since downloaded music from Play Music is saved as coded files in a directory that is not accessible by the user. If they're discrete mp3 files downloaded from somewhere else, then use a file manager app to copy the files over, or connect the phone to your computer via USB and use Windows Explorer.