Hi Sunny,<br /><br />Thank you very much for the answer! Please, clarify if I got you right:<br />1. To make accessible volume in the uefi shell I must include&nbsp;EFI_FIRMWARE_VOLUME2_PROTOCOL(FvSimpleFilesystemDxe) into the BIOS.<br />2. To include uefi application in the BIOS image I just need to include it&nbsp;MdeModulePkg.<br />3. To run application as a boot manager it GUID should be defined in&nbsp;<span style="color: #203864;">PcdBootManagerMenuFile&nbsp;</span><span style="color: #203864;">PCD.<br />4. To run&nbsp;</span>application from boot manager it need to use&nbsp;<span style="color: #203864;">LOAD_OPTION_CATEGORY_BOOT option.<br /><br />Thank you,<br />Sergey</span>