When you say audio samples what are you inferring?
actual audio samples for use in music production? (.wav /.aiff etc)
audio samples of your own productions/mixes?
audio samples, meaning TuneID attachments for identifying tracks?
It all depends on what you mean when you refer to audio samples, there are a lot of online file hosts (free and subscription).
Free hosts usually have limitations, such as file size, download speeds, account szie limits etc
Paid subscriptions do not have these restrictions but they can awkward for free users to download from (CAPTCHA's dynamic IP pool blocking etc)
Let us know exactly what you want to achieve and I can advise a bit better