How to Flash Samsung Firmware with Odin — 1 File & 4 Files

Complete guide to flashing Samsung Galaxy devices with Odin firmware packages.

For Samsung Galaxy devices, flashing with Odin is generally done using either a 1-file firmware or a 4-file firmware. Understanding the different firmware files and their purpose makes the flashing process easier and helps avoid common mistakes.

01 What the Firmware Files Mean

File Meaning Usually Used For
BL Bootloader Bootloader components
AP Android / PDA system Main Android system — usually the largest file
CP Modem Network and radio firmware
CSC Consumer Software Customization Full regional/carrier setup; normally erases data
HOME_CSC Same CSC package for updates Attempts to keep user data when supported

02 Samsung 1-File Firmware Flash with Odin

A 1-file Samsung firmware usually comes as an .tar.md5 file, commonly an AP package.

Steps

1
Back up your data first.

Back up your data first.

2
Download the correct firmware.

Download the correct firmware for your exact Samsung model.

3
Extract the firmware ZIP.

Extract the firmware ZIP on your PC.

4
Open Odin as Administrator.

Open Odin as Administrator.

5
Turn off the Samsung device.

Turn off the Samsung device.

6
Boot it into Download Mode.

Boot it into Download Mode.

7
Connect the device.

Connect it to the PC using a USB cable.

8
Confirm Odin detection.

In Odin, confirm that the phone is detected.

9
Click AP.

Click AP.

10
Select the firmware file.

Select the extracted .tar.md5 firmware file.

Odin
BL → Empty
AP → AP_....tar.md5
CP → Empty
CSC → Empty
11
Check the Options tab.

In the Options tab, normally leave the default options enabled. Do not select Re-Partition.

12
Click Start.

Click Start.

13
Wait until Odin displays PASS!

Wait until Odin displays:

PASS!

The phone should reboot automatically.

Important
  • A 1-file package is generally suitable when you're flashing the corresponding AP/system firmware.
  • If your package is actually a 4-file firmware, don't try to turn it into a 1-file firmware manually.

04 Samsung 4-File Firmware

BL

Bootloader

Load BL_........tar.md5 into the BL slot.

AP

Android / PDA

Load AP_........tar.md5 into the AP slot.

CP

Modem

Load CP_........tar.md5 into the CP slot.

CSC

Consumer Software Customization

Load CSC_........tar.md5 into the CSC slot.

Odin — 4-File Configuration
BL → BL_........tar.md5
AP → AP_........tar.md5
CP → CP_........tar.md5
CSC → CSC_........tar.md5

05 CSC vs HOME_CSC

CSC

CSC is generally used for a clean firmware installation.

  • Normally erases user data.
  • Provides a full regional/carrier setup.
  • Can be useful when troubleshooting software problems.

HOME_CSC

HOME_CSC is generally used for firmware updates when supported.

  • Attempts to preserve user data.
  • Useful for normal firmware updates.
  • Data preservation is not guaranteed.

06 4-File Firmware with HOME_CSC

BL → BL_........tar.md5 AP → AP_........tar.md5 CP → CP_........tar.md5 CSC → HOME_CSC_........tar.md5

07 Important Precautions

Before Flashing
  • Use firmware for the exact Samsung model.
  • Do not downgrade across incompatible bootloader versions.
  • Do not enable Re-Partition without a specific verified reason and the correct PIT information.
  • Use a stable USB connection.
  • Do not disconnect the device while Odin is flashing.
  • Back up important data before flashing.
  • Flashing does not normally remove Google FRP.
Exact Model

Always verify the complete Samsung model number before selecting firmware.

USB Connection

Use a reliable USB data cable and keep the connection stable during flashing.

Bootloader

Check the firmware bootloader or binary level and avoid incompatible downgrades.

FRP

A firmware flash does not normally remove Google's Factory Reset Protection.

08 Conclusion

Samsung firmware flashing with Odin is generally performed using either a 1-file firmware or a 4-file firmware.

A 1-file package normally contains an AP firmware file, while a 4-file package uses BL, AP, CP and CSC.

When supported, HOME_CSC can be used when the goal is to preserve user data during a normal firmware update.

Always use firmware intended for the exact device, keep the USB connection stable, avoid unnecessary Re-Partition operations, and back up important data before flashing.