Download and save files to local?

How to download and save those files to local?

We could use WWW to download text,picture,audio and use them in the application. But how to save them in local for future use. So we don’t need to download again.

The condition here is not use AssetBundle. More importantly, is how to save picture and audio?

If you are building a web player then it will have no access to the hard drive of the computer. This is a security feature. If you are building a standalone then you can use regular c# features to read and write files.