It can its possible to expand the available “disk space” of gp router, by using exroot.
So long the support of exroot not offered by firmware as offered auto mode, its interesting, how to do this step by step by normal users by hand.
Follow some sources about this:
- Generell information about exroot: [OpenWrt Wiki] Extroot configuration
How to implement exroot auto setup on openwrt devices:
" openwrt-auto-extroot can be used to build a custom firmware image that will automatically format and set up extroot on any plugged-in, but not yet setup storage device. The primary audience of this project is developers, who can use it to build customized firmware images for their applications, but advanced users should also be able to build a firmware by just running its build script as-is."
Source : [OpenWrt Wiki] ImageBuilder frontends
A searched are a how to, for user which are no firmware developer…