Hello! Mike,
Here’s what we can try next, in the right order so we isolate the problem:
1️. Test if MTP works outside File Explorer
This checks whether Explorer’s shell is the problem or the MTP subsystem itself.
Plug in your Galaxy → set it to File Transfer (MTP).
On your PC, press Win + R, type:
explorer shell:MyComputerFolder
Right-click your phone → Import pictures and videos → Review, organize, and import.
If this imports successfully, then File Explorer’s drag-and-drop handler is broken, not MTP itself.
2. Try direct pull using the Windows Photos app
Open Photos → Import → From a connected device.
This bypasses the standard Explorer copy routine.
If this works, you can at least move files until we fix Explorer.
3️. Copy using a different MTP driver
Windows 10/11 sometimes ships buggy MTP builds in cumulative updates.
We can force it to use the older driver.
Device Manager → Portable Devices → Your Galaxy → Update driver → Browse my computer → Let me pick from a list.
If you see MTP USB Device and Samsung Mobile USB MTP Device, pick the Samsung one.
Disconnect/reconnect and test.
4️. Fully uninstall KB5063878
Since the break happened exactly after this update:
Settings → Windows Update → Update history → Uninstall updates → Find KB5063878 → Uninstall.
Reboot, reconnect phone, test again.
You can block its reinstall temporarily using the “Show or hide updates” troubleshooter from Microsoft.
5️. Use a workaround until Microsoft patches it
If uninstalling isn’t an option:
Install Samsung Smart Switch for Windows — it can transfer photos without relying on Explorer’s MTP copy routine.
Or install Android File Transfer for Windows–style tools like AirDroid, Feem, or Google Photos web download for bulk pulls.
Best regards,
Kimberly