Credit:
Waseemulla S on Microsoft Answers

I had a USB device that I could not unload, I prefer the old dialog box anyway and found it is still possible to show this box in Windows 10. The forum post above has the answer, however according to someone was a very poor answer. For me the answer from “Waseemulla S” worked exactly as expected, it was then I found the USB Caddy I had plugged in didn’t support stopping the USB device in this way. Waseemulla S’s steps are below (I see no need to change it)

Create a batch file that will prompt you to “Safe to remove Hardware” with just a click.
Open notepad and type

“rundll32 shell32.dll,Control_RunDLL hotplug.dll”

Click save as and change file type to all files, type the file name Filename.bat (Where Filename is the name of your choice)
Double click the file anytime you want to get “Safe to remove Hardware” prompt.