question

@darshazureworld ,

Thanks for reaching out to Q&A.

Azure functions have built-in triggers and input bindings for Azure storage account. You can choose any language that you are comfortable with and write appropriate code to download the blobs from the Storage account. However, there is no output binding for AWS S3 in Functions. You will have to use the AWS S3 SDK to upload the blobs to S3 bucket.

I hope this helps!

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@darshazureworld
As @MughundhanRaveendran-MSFT said it is fairly easy to implement Az Functions. If you want to bind the changes (as you receive blob or change blob) then you can use something like in C#
[FunctionName("ChangeBlobTrigger")]
public static async Task Run([BlobTrigger("%SourceContainerName%/{name}", Connection = "SourceStorageConnection")]
Stream stream, string name,
IDictionary<string, string> metadata,
ILogger log)
{
//LIBRARY.METHOD(stream, name, metadata,log); IMPLEMENT THE CALL USING AWS SDK
}