Tp link archer c60 8mb to 16mb upgrade

hi i have an archer c60 v2 router ..
and i am thinking to upgrade flash storage from 8mb to 16mb..why do i want to upgrade? .. because by default i have 2mb more to install the package..but after i update all the packages. .all 2mb is full..and there is no room for me to install another package .. and from there I thought to upgrade to 16mb .. and I know just copy dump file from 8mb chip and flash to 16mb chip is not enough .. (to your knowledge I am a beginner in this matter) .. and can you guide me to upgrade the flash chip to 16mb from the beginning and i have no idea to make custom openwrt firmware from scratch or modified openwrt firmware

for you info..I already have some tools to do this work..example: solder iron, computer, CH341A Programmer, CH340 USB TO TTL,

and for 16mb flash chip i chose windond 25Q128FV chip

and I have made a custom socket to make it easier for me to swap this flash chip or flash chip

Hai bro do you fix your router 16mb ?