Tutorial: Mount boot stick partitions in Windows (edit grub.cfg, add extra.lzma)

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If you want to modify your grub.cfg of your written boot stick or want to access the partitions (adding extra.lzma from @IG-88) you can use a free portable tool.




- the grub.cfg is located in the folder "grub" on the first partition (15MB)

- the extra.lzma is on the second partition (30MB)


1.) Download MiniTool Partition Wizard Free Edition (portable):




2.) Unzip it and launch the "partitionwizard.exe" with administrative rights.


3.) Plug in your boot stick. Partition Wizard will automatically recognize the new drive. In this example it is drive no. 4. Now select the 1st partition of your stick (15MB) -> rightclick and select "Change Letter" in the context menu.




4.) Select a desired drive letter and click on "OK".




5.) In the lower left pane of the tool click on "Apply" and confirm the pending changes:






If everything went OK you should see a success message:




Now you have full access to the 1st partition with the Explorer or your favourite file manager.


If you're done with any modifications it's advisable to unmount the drive letter. The steps are nearly the same.


6.) Right click the 1st partition again -> "Change Letter" -> select "New Drive Letter: none" -> "OK" -> click on "Apply" to the lower left and confirm the changes.





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  • 3 weeks later...

I do as explained, partitions are mounted,  first partition (15MB)  can't be accessed, Windows tell me "You don't currently have permission to access this folder"

For the second partition, everything is ok , can be mounted and accessible from explorer.


I need this to copy grub.cfg.

Any idea ?



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