I have looked into
for specification of the MX4200 storage.
There are 2 versions of this devices, but both with 512NAND storage.
I purchased MX4200v2 and flashed (on both partitions) OpenWrt, but the storage what is showed on the OpenWrt LuCI page showing 110.56MB available.
I understand, that from 512MB some are used for system etc, but generally speaking storage always is close enough.
Here is Storage from (currently in use) Askey RT4230W REV6 RAC2V1K that I also have, which also have 512NAND.
353.91MB available in 512NAND is a huge difference to MX4200v2 110.56MB
Is there something wrong or maybe new device released is with different storage?