CRS354 on v7.1: Sector Writes Since Reboot

Hello there,
I do have crs354 switch that works mostly like an unmanaged one. No services are running on it. Nothing. And for some reason it writes something to the NAND.
Sector Writes Since Reboot: 184056
IDK why is that and can I stop or decrease that thing. What could trigger the writes to the storage at all?