What's the most popular External Hard Disk USB 3.0 Connection Socket?

 At USB 2.0 stage, it should be Micro USB.

Which USB 3.0 connector is mostly used on printer as well as hard drive?

For printer, it is a USB-B, but it really seldom finds a printer use a USB 3.0 Type B, instead, mostly still stay on its predecessor USB 2.0 Type-B.

For hard drive, there are 2 types of connector found on USB 3.0: USB-B and Micro USB. My Buffalo External Hard Drive is using a USB-B while my WD Passport is using a Micro USB.

No matter which situation, now you have a chance to connect to a computer if it got a USB-C socket.

 

 

 

For details: please have a look at usbfever, the SKU is UF006404