It’s not for the Epicor Data Directory as stated by @kve, which is the same place you get to with Server File Download.
This is a relatively common request and has been solved a few times.
I will go ahead and link you to a couple threads to give you some ideas.
Now keep in mind, some of this will be changing soon, with some changes planned with System.IO, but other than a few minor changes when that happens, the process should be the same.
If you want to explain some more details on what exactly you would like done, I may can help further.