Files whose names contain non-ASCII symbols (like Greek, Hebrew, Cyrillic letters and umlauts) are not supported in Azure and Amazon storages by default. As a result, they could not be uploaded through RadCloudUpload.
As of R1 2019, RadCloudUpload will encode such non-ASCII file names to base64 on the ASP.NET server before sending them to the cloud provider in case a non-ASCII character is present, and will use that encoded string in the blob metadata instead of the file name.
If there are no non-ASCII symbols, nothing will change.
This encoding logic applies to the other metadata fields as well.
As from Q1 2017, the RadCloudUpload is internally referencing version 3 of the Amazon SDK for .NET. Hence, you will be able to use all new features that come with this version. The version 3 of the AWS SDK for .NET uses separate packages (dlls) for each service. The RadCloudUpload only references AWSSDK.Core.dll and AWSSDK.S3.dll. For more information on how to use old version of the Amazon SDK with the RadCloudUpload, refer to this documentation article