If you read carefully the upgrade procedure posted at Ricoh page (
Latest K-3 Firmware Update : Software Downloads | RICOH IMAGING) and follow the procedure exactly, you may less fail the upgrade.
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Updating Procedure
*We recommend saving the card data before updating firmware.
*Prepare the FLUCARD that is formatted by camera.
1. Decompress the compressed file (v00010002.zip) on PC.
2. Insert FLUCARD to SD card slot of PC. (It can be used through SD card reader or SD card slot of camera).
3. Start-up sound will be beeped and wait until the beep stopped. (Approx. 20sec to 30sec)
4. Confirm the beep is stopped then copy the below folder and files (decompress at step 1.) to root directory in the FLUCARD.
Ącode
autorun.sh
html
initramfs3.gz
Program.bin
5. Eject FLUCARD from SD card slot of PC then insert FLUCARD again. Updating will be started automatically. (It takes approx. 60sec) You will hear buzzer sound while updating.
6. When updating is completed, you will hear beep sound. Eject FLUCARD from SD card slot of PC according to Safely Remove Hardware.
7. When updating is completed normally, folder and files (copied step 4) will be deleted. Afterward contents will not deleted even formatted FLUCARD.
8. Confirm the version of card and contents are changed to 00.01.00.01(card) and 00.01.00.02(contents).
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My tip is that you need to be patient enough to wait for step 5 completed (I would recommend 2 minutes).