How to enlarge rootfs_data and enjoy the full storage on my router?

[Moshe]

Hi there.
Bought a new Cudy X6 V2, which has 32Mb of storage (apart from 256Mb of RAM).
Used this FW:
https://downloads.openwrt.org/snapshots/targets/ramips/mt7621/openwrt-ramips-mt7621-cudy_x6-v2-squashfs-sysupgrade.bin
as well as the one they offer on their website:http://www.cudytech.com/openwrt_software_download

Both create an effective storage of 5.8Mb.

The problem: After updating all the updateable packages, you run out of space before even start working.

How do you change the rootfs_data size to enjoy the 32Mb this device has to give?

Here is what I grabbed from the The OpenWrt Flash Layout

Thanks!!

[badulesia]

There is no extra space available, so to be simple : you can't. Don't buy a device with so few flash memory. 64MB is the strict minimum, more is welcome.
But you can try the extroot method if there is an USB port (I can't find a picture for the exact device).

Extroot configuration

[frollic]

@Moshe

After updating all the updateable packages, you run out of space before even start working.

this, you should never do - https://openwrt.org/meta/infobox/upgrade_packages_warning