Hi Alyssa,
Welcome to Microsoft Community.
I understand how frustrating it must be to deal with Windows 11 not ejecting your Toshiba external hard drives on the first attempt, especially on your Surface Pro 11th Edition. The "Windows cannot stop your volume device" message typically means something is still accessing the drive, preventing a clean ejection.
it’s possible an application or process is quietly using the drive. Close all open programs—File Explorer, backup software, or anything that might access files—before ejecting. Even if you don’t think they’re using the drive, some apps (like antivirus or File Explorer itself) might be scanning or indexing it. After closing everything, try ejecting again.
Open Task Manager (Ctrl + Shift + Esc), go to the "Processes" tab, and look for anything suspicious—like a backup utility or file sync service (e.g., OneDrive)—that might be active. You don’t need to kill processes blindly; just note if something obvious is running, close it if you can, and try ejecting again.
Since you’re using Toshiba Portable Storage drives with a Surface Pro 11th Edition, USB drivers could be a factor: Drivers for hardware only work if they're designed for a Windows 11 Arm-based PC. For more info, check with the hardware manufacturer or the organization that developed the driver.
If a driver doesn't work, the app or hardware that relies on it doesn't work either (at least not fully). Peripherals and devices only work if the drivers they depend on are built into Windows 11, or if the hardware developer has released Arm64 drivers for the
device.
If the drivers aren’t ARM-compatible, you might see partial functionality—like the drive working for read/write but failing to eject cleanly—because the "Safely Remove Hardware" process relies on proper driver communication to release the device.
I hope this helps. If there is anything not clear, please do not hesitate to let me know.
Your SincerelyHahn. W - MSFT | Microsoft Community Support Specialist