80 GB laptop, Acer Aspire with Windows Vista. Drive C: nearly full and Drive D: is nearly completely available with 31.2 of 32.2 GB free space. How (or at least pont me in the right direction, OK?) do I format (correct term?) this in order to utilize all that free space to store music files?
Drive D: usually contains the recovery partition in the event you need to restore to factory settings. I recomend you don't format or delete any files it contains.
As you have 31 GB free on it, the 1 GB used isn't ging to make a big diference. Make a folder "Music" on it store your music to keep things tidy and copy/save your files in that folder.