How-To Geek on MSN
Blue, black, or red? What your USB port colors actually mean
Without clear labels, you can rely on colors, but remember that those aren't mandated by USB-IF, so they're not a guarantee.
USB has been around for decades, and the sheer number of USB and Thunderbolt versions in 2025 can be bewildering. Here's what you need to know about USB 3, USB 4, Thunderbolt 3, Thunderbolt 4, and ...
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