Here is the "complete story" of what this update is and why it appeared on your device: 1. What is this update? USB driver package
SAMSUNG Electronics Co., Ltd. - USB - 2.21.0.0 : r/WindowsUpdate
Users often see the update in their queue even if they haven't recently connected a phone, likely due to legacy registry entries or the presence of Samsung hardware like internal SSDs.
The package consists of several crucial sub-components packaged together:
Even with the correct driver installed, you may occasionally face issues. Here is a practical troubleshooting guide: