Using HTTPHandlers, Which Solution?

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C#

ASP.NET

Hi Masters,
excuse me because of the language,

I started to work on a little company, They wrote an Ecosystem, that contains some subsystems,
one of them is a system that handles operations like Delete, Upload, Download.
They called it Depot System. I have to work on Depot System and optimize it.

In Depot I have a DLL for Delete, Upload and Download that send request to my HTTTPHandlers like upload.ashx, delete.ashx, download.ashx with appropriate args on my Base Server, then check some credentials and if everything is OK, then send a request to my handlers on my Depot Server and for e.x. file has been uploaded.

Is this a good way?
if not what would be the best way to do that?

Your help is greatly appreciated.
Thanks.