This device enables the connecting of a compact flash memory Card to a 3.5 IDE interface. The optional CF card works as additional storage space, as well as HDD for an operating system since you can also boot from it. Specification https://elecena.pl/product/18341747/91620-compactflash-drive-ide 2021-05-05 https://elecena.pl/product/18341747/91620-compactflash-drive-ide 2025-04-06