Also some screens still use that one to act as an USB hub for the PC. There’s also a variant that is a but taller, but I don’t know what that type is for.
The tall bit on top of the type-B houses the five extra electrical connections that were added with USB 3.0.
Maybe you’ve seen the same on type micro-B which gets a little extra side car. Same story there, the same five connections were added on the side.
In a type-A connector they are in a second row deeper in the plug, you can see them if you look in, behind and offset by half to the classic four in front.
These three plug designs all allow the old USB 2.0 type-A, type-B and type micro-B plugs to fit in new USB 3.0 holes, they will simply make contact only with the classical four pins and work as USB 2.0 then.
Also some screens still use that one to act as an USB hub for the PC. There’s also a variant that is a but taller, but I don’t know what that type is for.
The tall ones are just the USB 3.0 version
The tall bit on top of the type-B houses the five extra electrical connections that were added with USB 3.0.
Maybe you’ve seen the same on type micro-B which gets a little extra side car. Same story there, the same five connections were added on the side.
In a type-A connector they are in a second row deeper in the plug, you can see them if you look in, behind and offset by half to the classic four in front.
These three plug designs all allow the old USB 2.0 type-A, type-B and type micro-B plugs to fit in new USB 3.0 holes, they will simply make contact only with the classical four pins and work as USB 2.0 then.