Write files in the share_init folder permanently?

[Juakin]

Hi!, Is there a way to write files to the share_init folder permanently?
I want to copy some custom shaders files/presets there and then use the HOTKEY + L2/R2 to change shaders on the fly.
I've copied the files but when I reboot they've been removed, is there a way to mantain them?

[acris]

Hello
See wiki for written partition