Quatech PCMCIA card drives allow desktop PCs to access the technology used in laptop, notebook and handheld computers. This enables easy data sharing between portable and desktop systems via memory cards or hard disk cards, as well as sharing of portable peripheral devices such as wireless modems, serial port cards and parallel port cards. PCI Internal drive units can accommodate Type I, II or III PCMCIA devices including memory cards, ATA hard disk cards, modems, and a variety of other PCMCIA I/O devices. In addition the front drive unit can accept one Type III card and one Type I or II card at the same time. This advantage means that both an I/O card such as a modem, and an ATA hard disk card can be used at the same time in the same drive bay. The F unit installs in a 3.5 front drive bay, but can be installed in a 5.25 drive bay using the SSD adapter. The B model installs in a single PCI slot and is accessed from the rear of the computer.