Originally posted by Racer X 69 Welcome to Pentax Forums.
Go to the Pentax web page here:
Latest PENTAX K-1 Firmware Update : Software Downloads | RICOH IMAGING
Download the latest firmware.
Load it onto an SD memory card.
Make sure your battery is fully charged. Once the process is started, it cannot be interrupted.
Read the instructions at the Ricoh web page linked above. As long as you follow them, you should have no issues.
You forgot an important step. Extract the update file from the downloaded zip file.
The file that is copied to the SD card root directory is fwdc228b.bin, which is extracted from the zip file that is downloaded.
Updating Procedure
Provide a formatted SD memory card for the update software.
The download file is self-extracting. The following file is extracted.
•Fwdc228b.bin: This is the updated firmware.
Copy the above Firmware file [fwdc228b.bin] to the root directory in the SD card.
If your computer does not have a card slot, you can copy the firmware update file by inserting the SD card into your camera and then connecting the camera directly to your computer.
Insert the D-LI90 battery into the camera and confirm the battery is full by battery level indicator then turn the camera off.
nsert the update SD card (prepared in step 1) into the camera (slot 1) and close card cover.
Turn the camera power on while pressing the MENU button.
"Updates the camera firmware" appears in the LCD monitor.
Ver: 1.00/1.10/1.20→1.30 will be displayed.
Press the four-way controller to select "Start" and press the "OK" button.
"NOW LOADING" appears on the LCD monitor and updating starts.
Please do not under any circumstances switch off the power before the update is completed.
When update is completed, the "COMPLETE" will be displayed at the left bottom of the LCD monitor, then turn the camera off.
Remove the update SD card from the camera.
*Confirm the version of firmware with above [How to check version].