The whole point of external USB-connected storage is that you can easily unplug it, but Windows's Eject Mass Storage option balks sometimes. Resist the urge to yank out the drive and try one of these solutions instead.
How to safely remove a phone from a PC - Quora
エクスプローラの使用方法
Problem Ejecting USB Mass Storage Device[12 Effective Ways]
エクスプローラの使用方法
How to eject an external drive or USB stick from Windows
Windows 10 - Wikipedia
3 Methods to Completely Wipe Hard Drive in Windows 10/8/7/XP
When Windows refuses to eject mass storage: 5 ways to safely remove a USB drive
Safely Eject Gps - GPS technology and devices - Geocaching Forums
How to Safely Eject an External Hard Drive
Top 6 Ways to Fix Unable to Eject a USB Drive on Windows 11
What is a synaptic pointing device? Should you remove it from your PC? - Quora