How to solve this warning ? MiB of physical memory. Oversized assets

Asset WiseGuy-Imports/300zw_hi.yft uses 24.0 MiB of virtual memory.
Asset WiseGuy-Imports/500gtrlam.ytd uses 56.0 MiB of physical memory. Oversized assets can and WILL lead to streaming issues (models not loading/rendering, commonly known as ‘texture loss’, ‘city bug’ or ‘streaming isn’t great’).

is it memory size full ?

Export your textures with OpenIV
resize them with XNresize and import them again.
then replace the old ytd for the one you resized.

you can follow this guide here [How-to] Optimize texture size | Fixing oversized assets | Bring any texture dictionary under 16 MB physical memory