when i tried to shrink the steamOS home partition and extend the windows partition i accidently destroyed my windowss installation. when trying to fix it the steamOS boot option also disappeared, so i went to boot from file, and where the steamcl.efi file was supposed to be i only found grubx64.efi file, adn when clicking it it booted to steam deck and it seems like normal. i’m pretty sure it isn’t good tho so how can i fix it? i also preffer not loosing my data if it’s possible.
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you can download the steam os image from steam official site on your usb then open up in the bios boot options ( hold - minus button + power button) and install it
that just means grun (the bootloader) lost where that efi file is. Don’t worry everything is perfectly intact and this is a known quirk of grun. I’d suggest rebuilding or re-configuring grub of you look online without changing anything related to it