Don't get too excited, though — the listing shows the publishers as "Internal Beta Account". That likely means Microsoft is testing the OneDrive Windows 10 app among its employees but its not ready to be released to the general public. As a result, most people won't be able to download it, and even those folks that do have the rights to use it will most certainly encounter bugs. It's likely we will have to wait a while before the OneDrive app is fit for public use.
Via: WalkingCat (Twitter)