Yes you read it right, 10gb !!!
"The OLPC (One Laptop Per Child) organization has made 8.5GB of free
samples available, from a range of sources such as the Berklee College
of Music sample archives, music synthesis Majors, and many others. The
samples include Sound Effects, Loops, Grooves, Drums, Voices and
Instruments, and are 16bit 44.1khz mono WAV files, all normalized"
There is actually over 10gb of sounds there now so go knock yourself out !
FREE SAMPLE DOWNLOAD