Hi Gonn Alex,
Welcome to Microsoft Q&A!
I can see that you’re looking for information regarding CrossDeviceResume.exe. To provide the most accurate assistance, could you please share a few more details? For example, are you seeing an error message, experiencing high CPU usage, or simply curious about the file's purpose?
In the meantime, and maybe helping to put your mind at ease, CrossDeviceResume.exe is a legitimate Windows system component. It is located in the MicrosoftWindows.Client.CBS folder and is a core part of the Windows Cross-Device Experience.
This service powers features like Phone Link, Nearby Sharing, and 'Continue on PC' transitions. It is not a virus or malware, but rather a standard background process. It generally does not require any manual intervention.
However, if it is causing a specific performance issue, please let me know and I will be happy to help you troubleshoot it further.