3X(USB 2.0 KVM 1X2/2X1 Switcher USB Splitter Shared Controller for Laptop4577
(Type:B: 1 x USB 2.0 Switch Switcher. 1 x USB 2.0 Switch Switcher). One computer can hold 2 USB flash drives without plugging or unplugging, and hardware switching is isolated to prevent USB flash drives from communicating with each other.