Based on the terminology mrdlx1, you are referring to the MotoRex Mr. Dlx1 (often stylized as MR-DLX1), a specialized Bluetooth audio receiver known for its "audiophile-grade" DAC implementation.
Simply put: when MRDLX1 says "exclusive," it means sole custody. mrdlx1 firmware sd card exclusive
If you are seeing documentation referring to "exclusive" files, it typically refers to the Device-Specific Binary. Based on the terminology mrdlx1 , you are
Select Software Upgrade > SDCard Upgrade and confirm with OK. The phone will reboot and begin the installation. Method 2: Force Upgrade (Three-Button Method) This is used if the device cannot boot into the system: Power off the phone completely. The phone will reboot and begin the installation
The keyword "exclusive" is not marketing fluff. In engineering terms, it means the MRDLX1 has been programmed to ignore all other flash methods (USB DFU, ISP, OTA) when a specific condition is met regarding the SD card.