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USB Micro-A: USB 3.0 Micro-A connectors are rectangular, "two-part" plugs and are found on many smartphones and similar portable devices.USB 3.0 Type-B plugs are not compatible with Type-B receptacles from older USB standards, but plugs from those older standards are compatible with USB 3.0 Type-B receptacles. USB Type-B: These connectors, officially referred to as USB 3.0 Standard-B and USB 3.0 Powered-B, are square with a large notch on top and are usually found on printers and other large devices.USB 3.0 Type-A plugs and receptacles are physically compatible with those from USB 2.0 and USB 1.1. USB Type-A: These connectors, officially referred to as USB 3.0 Standard-A, are the simple rectangular type of USB connectors, like the plug at the end of a flash drive.
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