Interesting! I did nothing special to my FP4, it runs the latest OS FP4.TP21.C.0121.20240626. And i never questioned the system size, as something about 1 GB seemed reasonable to me.
That is the reason why I’m shocked about the FP5 system size. 35 GB is a lot, even a newly installed Windows does not take that much storage space.
When i unboxed the FP5 it had Android 13 installed, system size 35 GB. After the update to Android 14 (FP5.UT20.B.041.20240624) it now shows 30 GB system storage.
I did deactivate some of the preinstalled Google apps, which might explain why the system storage is now smaller than before.