RaidSonic GT5630-4S-SB2 is an external HDD enclosure that can accommodate up to four 3.5-inch SATA HDDs. It features both eSATA and USB 2.0 interfaces, allowing for flexible connectivity options. With a JBOD configuration, the device presents each installed HDD as an individual drive to the operating system. Each HDD tray has an LED indicator to display the drive status. The enclosure also includes safety features such as an overheating and fan failure alarm with both LED and buzzer notifications. The built-in 8 cm fan is temperature-controlled, ensuring optimal cooling.