Firmware version AESKW528. This firmware makes the flash media to appear as removable disk using eSATA or SATA connection irregardless of the switch setting on the drive. This feature is to make the media useable by certain software designed to work with removable media only. Using this firmware, the flash media can no longer be used for booting as most OS do not support booting from removable disk. Please make this firmware request by creating a ticket to our tech support department http://www.addonics.com/support/ticketid/create.asp.