Could you please to explain a bit more... I am not sure what you need

Yes, but you have to use the appropriate tool provided by your backup software. If you are using Veeam, then you can create a repository with your USB, and then create a backup copy job taking the DataDomain-repo as a source and USB-repo as a target.

Hope it helps.

thanks

i already think about that solution but i wonder about any solution from Data Domain Side