Expanding filesystem on sdcard

I have a nanopi r1 with owrt 24.10.3 squashfs version on sdcard.

I want to use my full 2GB card for openwrt , i found https://openwrt.org/docs/guide-user/installation/installation_methods/sd_card especially the squashfs part.

I already booted the system so i cant use option 1.

It also states to unmount the squashfs partition but wont that crash the running openwrt system?

Check if https://openwrt.org/docs/guide-user/advanced/expand_root works for you, but https://openwrt.org/docs/guide-user/installation/installation_methods/sd_card#expanding_the_filesystem should be enough ?

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Thank you , what about my other question if i want to try manually?

It also states to unmount the squashfs partition but wont that crash the running openwrt system?

OpenWRT doesn't really do any constant data writing to disk (unless you changed the defaults), you should be able to remount the partition as read only, and perform the resize.

Manual method didnt work for me / but the advanced method script worked great thx

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