Some MP-1769 revisions support USB updates. Process is identical, but the file must be on a FAT32 USB 2.0 drive (not 3.0). Insert into the designated port.
If your unit is just running slowly, you may not need a full firmware flash. You can: alpha coustic mp-1769 firmware download
Before looking for a download, check what software is currently running on your device. Some MP-1769 revisions support USB updates
Finding the exact firmware file is critical. Using the wrong version for a different model can permanently damage your head unit. How To Update Your Android Head Unit + Apps alpha coustic mp-1769 firmware download