The DeX app for Windows lets you mirror your phone screen to a PC and easily drag and drop files between the devices. It’s very similar to Microsoft’s Phone Link app, which Samsung and Microsoft have collaborated closely on in recent years, so it makes sense that Samsung is favoring Microsoft’s native Android linking app in Windows.

Users can switch to the Link to Windows app to connect their Galaxy smartphone and Windows 10 or Windows 11 PC.

One UI 7 is, according to Samsung, likely to come sometime early next year. That timeframe has been delayed significantly from the original release timeline. Whenever that One UI 7 release happens, the DeX Windows app will no longer be supported, though DeX capabilities will remain. That includes connecting peripherals to a Galaxy phone.

Samsung's upcoming One UI 7 update, based on Android 15, promises a host of visual enhancements and performance improvements. While the company has not officially revealed much about the new interface,

Samsung is keeping One UI 7, its upcoming Android-based interface, under wraps, with only a few leaks hinting at new icons and minor interface tweaks

Samsung Dex for Windows app will soon be discontinued with the launch of One UI 7 and will be replaced by “Link to Windows” feature.

Samsung DeX is going away with One UI 7, but probably not the one you're thinking of. In the footnotes of the landing page for DeX on Samsung's UK website, the company shares that

Starting with One UI 7, the Samsung DeX app for Windows will no longer work. As an alternative, the company suggests users make the switch to the Link to Windows feature.